Malicious PDF — malware analysis report

Static analysis result for SHA-256 421b3ad2e097918b…

MALICIOUS

PDF

70.9 KB Created: 2020-08-26 02:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f51bafdb31c3559a1bc6debd4406569 SHA-1: 7f93df11673a7288dfe056c9a68abdf549b34e32 SHA-256: 421b3ad2e097918b1858e925c1724da0aca0ddec3be39a53f775cc377b64fab7
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that appears to be a download for "Solidworks 2013 bible pdf". This link, however, redirects to a known malicious redirector at `ttraff.cc`. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely for SEO manipulation or to host further malicious content. The presence of a "download button" heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=solidworks+2013+bible+pdf In PDF document text
    • http://files.austintatiouseats.com/uploads/1/3/2/7/132712209/ninaku.pdfIn PDF document text
    • http://files.actorbritthalaas.com/uploads/1/3/2/7/132710665/3871983.pdfIn PDF document text
    • http://files.whisperwindaussies.com/uploads/1/3/1/4/131410870/kakaxivono.pdfIn PDF document text
    • http://files.ericmccarron.com/uploads/1/3/0/8/130874382/3594543.pdfIn PDF document text
    • http://files.rylequotes.org/uploads/1/3/0/8/130873921/kumam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7102/7865/files/novilubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1840/1430/files/46544496749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/stent_thrombosis_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/texugupadixixokakaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/65370633141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/94774734485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/zosavosugeminuvalibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/jelapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1286/3638/files/bassoon_christmas_music_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0672/2211/files/38763461229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/72426960427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/2008_toyota_highlander_service_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 17648 bytes
SHA-256: 4e244410a8225c3cbfcbba09f875e532168e6a73c1f5f22fc8393fa12059fe27
font_01_sfnt_off0000b27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27C 5316 bytes
SHA-256: 372f277155daec557f05c5bfe0a664b631ba57320ec98f64617bc75112264b0c
font_02_sfnt_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 10024 bytes
SHA-256: 6b936a982366179184454093925d89f8b6ca59b197e92f2a6e50d1d277813a89
font_03_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 16836 bytes
SHA-256: a0fc46ef69ad46c7b35fe613eb562f013af540b55bd9b224171bae216eb7756f
font_04_sfnt_off0000ff0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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