Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ea306ca6db62a4…

MALICIOUS

PDF

39.8 KB Created: 2020-08-21 06:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dfd3d5e9e4126b65bfd5600b7c741024 SHA-1: f0dc4b8f12772815e8af2981eebd585e08bf650e SHA-256: 77ea306ca6db62a42c24ee819196ad4a7bb93557cc0b9b99a1c65eeb4502e9d4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, includes the malicious URL and appears to be a lure for users to click on these links. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

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=b+team+theme+song In PDF document text
    • http://tibew.absipartnership.org/uploads/1/3/0/9/130969950/tibigokodusinexisu.pdfIn PDF document text
    • http://files.belladesgagnes.com/uploads/1/3/1/3/131398010/nufasimuzo_nozefediwibom.pdfIn PDF document text
    • http://files.evaatkinson.com/uploads/1/3/0/8/130874541/totovala.pdfIn PDF document text
    • http://zopujegoj.sunrisestudioseh.com/uploads/1/3/1/3/131380213/pajuzewodukipivizu.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/1/0438/9208/0795/files/tafixilesesesuzumixojonex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/al_ghazali_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/unduh_vidmate_apk_versi_lama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/junefowimufameken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/48014614987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8244/9045/files/retirement_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/xuxujagororinum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/23811622517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/94455280739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/fundamentals_of_communication_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/cad_soft_tools_to_dwg.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5174 4760 bytes
SHA-256: 81a93281867f93683e2c6c5f6b27def0dfba6f3f6e71d6601da75a35f97b1d45
font_01_sfnt_off00006173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 10192 bytes
SHA-256: 1f72acffa02a2cf16658a772c3a82fc425147a0fabc5f8e475c7ceabf8c9681c
font_02_sfnt_off0000844c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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