Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b87279b050e201…

MALICIOUS

PDF

43.6 KB Created: 2020-08-08 23:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d4fe0f512b26b51ecba0aa924e5b658 SHA-1: da9140fc18213b9d3a3440f6b9b488ff71031f4e SHA-256: 99b87279b050e201297ac94cd34ceb6cc2dead4d0ec083da73c337bd9d41949d
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of an advance-fee scam, using lures related to prizes and courier delivery. It contains a high number of embedded links, with at least one identified as a malicious redirector hosted on ttraff.ru. The document's content and structure strongly suggest a social engineering attempt to trick users into visiting malicious sites or engaging in fraudulent schemes.

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=powered+by+the+apocalypse+system+pdf In PDF document text
    • http://files.positivelyobedientcanines.com/uploads/1/3/1/8/131871740/gerosekopob-gusemezer.pdfIn PDF document text
    • http://files.agcompa.com/uploads/1/3/2/6/132683188/demasirij.pdfIn PDF document text
    • http://files.augsburgtoledo.org/uploads/1/3/0/7/130776886/tifemowegajo.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/1/0437/8948/4190/files/waribojovejirejekuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/4095061707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/belajar_bahasa_thailand_dan_tulisannya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/fejofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/fanadiraxunupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/53492723846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/certification_of_trust.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/eu_creio_pequeno_catecismo_catlico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0605/files/fiwuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/bazamexisowusipabidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6943/9141/files/maulid_burdah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/61834025213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/wuvabel.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 5

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_off000069fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FB 5728 bytes
SHA-256: b36f6133865a7a72aa57a29050612233a4f33b8cf6e0a05fc2c11569ceb186e9
font_01_sfnt_off00007d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5F 10708 bytes
SHA-256: a89872aaf960e4abd6b9b4e55debb12d05dd22162e0e75a94826ad85259a097a

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