Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d47dc521b11a09…

MALICIOUS

PDF

42.8 KB Created: 2020-11-06 03:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d23558f46c3020468ef821b11694997f SHA-1: 3df0f4d1916ca22002702468d82f011d37e03e12 SHA-256: 67d47dc521b11a09779d42122afb6a6d48ed4a8d0cba3ea7b201096867956128
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, many of which point to SEO-farmed or potentially malicious redirector infrastructure, such as 'traffmen.ru'. The document body itself appears to be obfuscated or corrupted, but the presence of numerous external links suggests an attempt to redirect users to 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.
  • 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://traffmen.ru/aws?keyword=700r4+transmission+rebuild+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f88c6aa69373.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/6d875b22255267f.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/552cb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8703922dfc8.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/f1a21c8d125b8.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/duwifizipomulak.pdfIn PDF document text
    • https://rumorima.weebly.com/uploads/1/3/4/3/134307849/sagorepewuro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ea996b-2306-41f3-9481-aa20596125c4/4339838718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc97d849-2fef-43dc-9eba-e7efbed969f4/966087927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6aebfcf-4cda-41dc-948b-8372756ec233/zononolonesuxuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/male_pine_cone_vs_female.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c95878-99f7-4d47-9820-e1a9db93695c/jedogizovirilopofovon.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/autocad_printer_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a55d28-aedf-4420-83d2-c0be1da0ffec/komilononarebisapixida.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_off000069ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69ED 5540 bytes
SHA-256: 67a44e7ca44171099e273e76bc784341a4316048b98e347fd22feebbc282c8d9
font_01_sfnt_off00007cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 9856 bytes
SHA-256: 292feda0ff9c36f48560c6232ab88537001b751e6fe86259d9c3e49cd33fc310

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