Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf0fb3420f8a490…

MALICIOUS

PDF

33.1 KB Created: 2020-10-29 23:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7f574cfbb1e3864d81b3eca74a743295 SHA-1: 7d5f49f1ee8802dc36d1441f59eacc82aafd37ea SHA-256: adf0fb3420f8a490b9b5d0b2ef581e30432d937a2f0ff9ec932a18f171853134
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier as malicious and contains multiple embedded URLs. Several of these URLs point to disposable hosting services and are designed as a link farm, ultimately redirecting to malicious infrastructure like 'cctraff.ru'. The document body, though heavily obfuscated, also contains URLs suggesting a lure related to 'adventure time laptop stickers'. The primary attack pattern involves luring users through deceptive content to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/aws?keyword=adventure+time+laptop+stickers In PDF document text
    • https://somolepudurupe.weebly.com/uploads/1/3/4/3/134332146/413798.pdfIn PDF document text
    • https://pipalilivo.weebly.com/uploads/1/3/4/3/134310902/53c1a937432c8.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/5390495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f9a0b6713fe4.pdfIn PDF document text
    • https://vemifibu.weebly.com/uploads/1/3/4/3/134354414/lawovexid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_5f9573537fcbb.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/2527536.pdfIn PDF document text
    • https://renesixedobalew.weebly.com/uploads/1/3/0/9/130969137/vepipokebewa.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/1/0499/2801/1945/files/tavijexexopepiverava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9669/7749/files/mukaxusowexezewomal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2904e1bd-9b95-4abd-b2f8-74aec04993c3/dotagiri.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_off000046e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E0 5332 bytes
SHA-256: 0be50855a2582477aa91b9af4bbed5f0562c15999ab998517d20340d6193a529
font_01_sfnt_off000058ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EE 9020 bytes
SHA-256: 740a016ea7a53a8170ac1fab8b51ab6ebb3ee64a6d615023103f73041c300a3c

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