Malicious PDF — malware analysis report

Static analysis result for SHA-256 5440e65516a34327…

MALICIOUS

PDF

45.9 KB Created: 2020-10-01 22:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2bff8720ea28b00310b5803fa11538cf SHA-1: 43c6aec63fd99d60b53914e61e9a12e9113eff4f SHA-256: 5440e65516a34327ee8ebf4180c8bfbb5c393dbddbbf3441ffc9527c569142de
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs, suggesting a link farm or SEO poisoning tactic. One prominent URL, https://ttraff.me/pify?keyword=pollak+plug+wiring+diagram, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to PDFs hosted on various platforms, indicating a lure to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.me/pify?keyword=pollak+plug+wiring+diagram In PDF document text
    • http://xiruv.merilynmerisalu.com/uploads/1/3/0/8/130813765/8851205.pdfIn PDF document text
    • http://files.northrydebeautyandspa.com/uploads/1/3/2/8/132814476/953189.pdfIn PDF document text
    • http://nipemus.danhegstad.com/uploads/1/3/1/4/131406258/6525754.pdfIn PDF document text
    • http://files.minnesotadivingacademy.com/uploads/1/3/0/7/130739892/3f50bbe47bfd.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/1/0437/6946/2935/files/vederozekowodawovazelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/specific_heat_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8002/6774/files/art_history_marilyn_stokstad_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931314ba-16ae-44a2-be8d-29b9443c102c/netuwat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728c42ab-7cb5-4cf2-983f-9c8bfe4bd1bc/sikutupuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450ca5c2-5087-47d1-a997-99a80201ecfa/fanepivulonolad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9910/5696/files/avatar_viewer_xbox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4829/9417/files/oakview_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6626/4214/files/meet_me_at_the_hotel_tik_tok_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0542/9928/files/salesefibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3156/8290/files/my_strange_hero_kdrama.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_off000065b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 5256 bytes
SHA-256: bce3845c97e10b897dcade66ca9900a47449bf44fe9329d37ac9d29414be656f
font_01_sfnt_off00007795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 15748 bytes
SHA-256: 06ce6e7833d4ef7365879b7fb5c658219382dc73e8f4684e97888c63fe054eb9

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