Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec6d243c650feb7…

MALICIOUS

PDF

43.4 KB Created: 2020-09-16 21:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 008f560bf23cc55b42baa6d01b86599d SHA-1: 345a3a3c544840769907c3544f99a124844c0a2f SHA-256: 9ec6d243c650feb795341cb44661e675c017c1ee7f426ea93f617ee6ca7dd840
184 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a book download, which redirects to a malicious URL. This URL is part of a link farm designed to host numerous other PDF files, likely for SEO poisoning or to distribute further malware. The ML classifier strongly indicates maliciousness, and the PDF structure is consistent with a lure for malicious downloads.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=inventing+arguments+4th+edition+pdf+download In PDF document text
    • http://files.norsegodsasatru.net/uploads/1/3/0/7/130740249/wejezi-kozizawulalova.pdfIn PDF document text
    • http://files.jeebdesignfishers.com/uploads/1/3/0/7/130775987/puwafej.pdfIn PDF document text
    • http://xituz.littlelifecorner.com/uploads/1/3/2/8/132816066/biwuvaso-naguzo.pdfIn PDF document text
    • http://zejitow.rivernationxc.com/uploads/1/3/0/8/130874330/virogaxobibog.pdfIn PDF document text
    • http://files.markpacoe.com/uploads/1/3/1/3/131382497/baluditokitap-xadidozab-tagamaviwaf.pdfIn PDF document text
    • http://dawuxejop.tavisdupreez.com/uploads/1/3/1/4/131438304/migakiwutekufalawez.pdfIn PDF document text
    • http://files.dakotadesigns.net/uploads/1/3/0/7/130740493/jilakeveluked_nerewezidijabuf_zirite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a9670a05-2a27-4618-a4ba-492436fd20b7.filesusr.com/ugd/544e7e_e52b9d0bb4c046de8e499b3fbb62928d.pdf?index=trueIn PDF document text
    • https://f32f1de8-35cc-40f1-b61a-cb433e41b19e.filesusr.com/ugd/003b86_7a1fc05a893f45338fb4708546905e01.pdf?index=trueIn PDF document text
    • https://1e03311a-72f7-486f-a174-27e418b01595.filesusr.com/ugd/61b8bf_01e621fb38d04afbb76430d9f32a3b4d.pdf?index=trueIn PDF document text
    • https://a86ff28d-c01a-4543-900c-21f02f02fa54.filesusr.com/ugd/3d514e_b73b4dd0ef8f41e682b30b4d6cee9bcc.pdf?index=trueIn 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_off000062ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 5632 bytes
SHA-256: b66eccb3a140ba7dbb7e68678d1ea97dc8a0703324267b44c3bd9b6f1cae281f
font_01_sfnt_off00007620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 12508 bytes
SHA-256: 259716706cde3913104a3e102813aff93d5b5d5df625514ddbc2143811156b1b

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