Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1504b269ea4648…

MALICIOUS

PDF

40.3 KB Created: 2020-08-23 00:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb9933e43337e10e8fc068d1b093e189 SHA-1: aaa042c500b7c80b878f2f63e049b342a9ff3b4f SHA-256: 4b1504b269ea4648078d7928f7554c50b61b8d05e27d602cb0ef8fd5fe76fa15
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a mass external PDF link farm, suggesting a malicious intent related to SEO manipulation or traffic redirection. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.ru', are the highest priority IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=materiales+polimeros+pdf In PDF document text
    • http://files.creativethoughtevents.com/uploads/1/3/1/4/131409024/puwadimako-guribujuvudinas-vunanapuligofut-xaxowob.pdfIn PDF document text
    • http://wadur.mylittleretreatspa.com/uploads/1/3/0/8/130813528/ranevarujedunu_xobawilexebosi_filelifaxow.pdfIn PDF document text
    • http://files.joywinsdammit.com/uploads/1/3/1/8/131858592/ferufemufuwive.pdfIn PDF document text
    • http://files.ellibrodeespanol3.com/uploads/1/3/1/4/131437377/fivuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0067/6003/files/bodotajemibovifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/zewosujotowonupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/bionix_animated_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/80819990641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/32425777192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/84384961580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6757/8270/files/93410880730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6058/4870/files/rhye_open_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/22843486417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/25888551407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/jokosabo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5192 bytes
SHA-256: 8332872e0d2068838cc18ddeb9d28b73e9543f7df2a79ea294315a7b87318807
font_01_sfnt_off000073b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B0 9664 bytes
SHA-256: 5d67dc3f9016ffe8337bdfb5cf8ed98c5164892a78fd08facc91d4df269c485e

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