Malicious PDF — malware analysis report

Static analysis result for SHA-256 309c99f5969c799e…

MALICIOUS

PDF

38.5 KB Created: 2020-08-07 09:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da5737c8edced3111155ba5ce777dd47 SHA-1: dd951a7a44f3808f5c9f4358c04cf77ca47c82d2 SHA-256: 309c99f5969c799e4b9ea1a6823a82df2563afa19afaa8094a6eca856d880e6c
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirector link to 'ttraff.com'. Another critical heuristic identified a mass external PDF link farm hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful content through a link farm, likely for SEO poisoning or phishing.

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=bk+precision+880+pdf In PDF document text
    • http://mololaz.keschafferart.com/uploads/1/3/1/4/131438405/fusolazukemijono.pdfIn PDF document text
    • http://files.beautifulweddingsbyina.com/uploads/1/3/1/1/131163667/d08ad.pdfIn PDF document text
    • http://jisij.music-connect.net/uploads/1/3/1/4/131407233/mabilujibotoxup_visaremadoz.pdfIn PDF document text
    • http://files.thepatchworkunderground.com/uploads/1/3/0/8/130813887/1879273.pdfIn PDF document text
    • http://dedate.camrapenn.org/uploads/1/3/1/4/131453870/fbbad1918785760.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/1/0430/1540/5725/files/acidose_diabetique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/difference_between_amorphous_and_crystalline_solids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/musakokunomotuvolamav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/fopizuxafuweromomunov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/pearson_physical_science_textbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/mijabewetapunipaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musigusuwekun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/23486263813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7128/3098/files/14331822543.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 4

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_off00005749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5749 5356 bytes
SHA-256: 86dcc7e0b543457e1b0c3b8b5487122dfe5c928dd76484d33917e74b53168b3b
font_01_sfnt_off000069a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A0 10476 bytes
SHA-256: 170617642c710ac944fc6d1a4c0941e5c733bd6995ba6dccfa571afcbd14f81d

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