Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd74492f78ef444…

MALICIOUS

PDF

61.2 KB Created: 2020-12-19 02:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6410a8a1ef99b35aec88b82cca006e82 SHA-1: d61e976b155d8fe9c2627c9496865c8fc0c4e160 SHA-256: 8cd74492f78ef4443e58797753a0649a01dcee1455a8b9a6997ec4a1d6b41253
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, pointing to 'https://traffine.ru/123?utm_term=ikea+pillow+covers+outdoor'. The document's structure and the presence of numerous links suggest a link farm or phishing attempt, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://traffine.ru/123?utm_term=ikea+pillow+covers+outdoor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f97c97a00d8f.pdfIn PDF document text
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/2410533.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/c7a2e0.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/210ea298ff9894.pdfIn PDF document text
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/kukaxemaretipa.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/fuxapogisorotolagajo.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/savotovuwufakomi.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/cdbf10f2760b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5216c7d0c8f249d5c593f/t/5fd1aae31693665fc7cf4d84/1607576292918/cat_hair_salon_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef5a494f25741fd4a8c5e/t/5fd22467eeaf2774ac95d984/1607607399514/supreme_stick_fighting_battle_2_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbf0116eb00e3c4bba69/t/5fc3ad56fa04221c719055f4/1606659415982/dobif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52571d26ff1194f8f7eca/t/5fd0c6c05c296e7a687cdf24/1607517889351/free_full_movies_online_unblocked.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A5 5220 bytes
SHA-256: bba3981ce2a12f4261a9b0077eacc77534f4393ebecd2cac85e89ef84d037db3
font_01_sfnt_off0000c693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC693 10176 bytes
SHA-256: 640cc46345b2d9eb6b1efd5b539c941e81821b27ecd7e9a10963650459b1cb49

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