Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd731403c9cdbbd…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 17:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a99d0a3292795981a247f43066c72260 SHA-1: 1fea2c5e7b2cadd58a102a498656a012097d7e35 SHA-256: afd731403c9cdbbd5c221c67e3434d3b5d0eac745ae160f21a568394ff326fbe
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Excel assignments for college students pdf' and a URL that appears to be part of a link farm designed to attract traffic. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other potentially malicious sites.

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=excel+assignments+for+college+students+pdf In PDF document text
    • http://dadurim.eycdioatl.org/uploads/1/3/2/8/132814930/3360116.pdfIn PDF document text
    • http://sudunito.nbhala01.net/uploads/1/3/2/6/132695569/dokiweke.pdfIn PDF document text
    • http://vovupuv.frank-webb.com/uploads/1/3/1/4/131482952/1731168.pdfIn PDF document text
    • http://files.rebeccaseaberry.com/uploads/1/3/1/4/131408241/petikeb-zifilig.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/1/0432/9416/3109/files/82254189087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/hambriento_nach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/vasedovepetekokesikaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/bupijifako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0899/9074/files/70255773452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/kotor_2_will_work_for_fuel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/nelonijimovazejiwatujeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/fatopogunudawadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8453/4180/files/bejeweled_2_deluxe_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/68182113325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/arteritis_de_la_temporal_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/assassin_s_creed_book_download.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 3

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_off0000742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742C 5500 bytes
SHA-256: b7561e1aad5e743eb78228b18f62d766c66bf132a7f08ae47ca7963ec7e96c7c
font_01_sfnt_off000086cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 10524 bytes
SHA-256: ebaee771ce4d8de9d0072d29a715d8bebdb807502416f75a909ea94916df6ddb

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