Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b86f9cdf06ed590…

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 05:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe248f296e6d4c2b2cbdbecf491bdfd4 SHA-1: 45dec6d80cb975f23de780a9716a0d79cc1658ab SHA-256: 1b86f9cdf06ed590bbcd9dd21e036e5b3c9f587ac1040fb11476bc408e6a85b2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm designed to appear as a resource for crossword puzzles, but it redirects to malicious infrastructure. The primary malicious URL identified is ttraff.com, which is flagged as a redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be generated by wkhtmltopdf, suggesting a programmatic approach to creating deceptive content. The presence of numerous external links, many pointing to Shopify domains, further supports the SEO link farm heuristic.

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.com/pify?keyword=crossword+puzzles+pdf+middle+school In PDF document text
    • http://files.diversityunitkncirg644.com/uploads/1/3/2/6/132682676/besigu.pdfIn PDF document text
    • http://fexurob.shelbyveterinaryservice.com/uploads/1/3/0/7/130776783/ca35eeb19b.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/1/0436/3704/7449/files/dolphin_browser_for_windows_10_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9020/6117/files/56811530478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/crop_evapotranspiration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/mogoruva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/62068173890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/49470943963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/wirujovatavonajezutojupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/96954796459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9665/2442/files/football_squares_online.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_off00005fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5232 bytes
SHA-256: 3d5d78aa37069ad037291d54f898026eea53b2fec0a3a1fb46716e24f53582b6
font_01_sfnt_off000071a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 10568 bytes
SHA-256: db00e1f2d996468dc2e9815ea14d80c438fad86f8255adca17fa3bf18b25e72a

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