Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2f2d9f296beae5…

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 05:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09b44f9b88632a00d9e9ae0ab67a9f4a SHA-1: d25815989c7196d92580f28b7ec7b21457eae91a SHA-256: 6c2f2d9f296beae5fe2f25a18fc3fdffed3196c430791f6ef460767b44008299
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded URLs suggest a lure for free software, likely a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs strongly suggest an attempt to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

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 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.
  • 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.com/pify?keyword=programa+para+convertir+de+pdf+a+word+nitro+gratis
    • http://files.singerbec.com/uploads/1/3/1/4/131409017/zunezugupamadidugexu.pdf
    • http://files.genwhy.com/uploads/1/3/2/6/132681308/xetoj.pdf
    • http://nuzoku.glacieraero.org/uploads/1/3/0/8/130874493/titokuku_gewibewe_tasuzup.pdf
    • http://kifumodi.brentwood-tutors.com/uploads/1/3/0/7/130776257/d15e2822a6.pdf
    • http://benogok.rosmanith-mclean.com/uploads/1/3/2/6/132681647/soxudosapapuvub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/74409297163.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/19411368064.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/36949224666.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/395654762.pdf
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/jetew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vololo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/4063436479.pdf
    • https://cdn.shopify.com/s/files/1/0449/3040/0411/files/avast_turn_off_popups.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/3004406815.pdf
    • https://cdn.shopify.com/s/files/1/0429/0579/6774/files/badujosojitudibofapavek.pdf
    • https://cdn.shopify.com/s/files/1/0448/2914/7293/files/clinical_biostatistics_and_epidemiology_made_ridiculously_simple.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/wisukepotitapopazokivuses.pdf
    • https://cdn.shopify.com/s/files/1/0430/6868/6497/files/78029311341.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/chamberlain_whisper_drive.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/54413046926.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c5f.bin
7f8f18b1857b37c21845c4599b17c95ec6b4156860a9c8190ca38ee22a8bf162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5F 5596 bytes
font_01_sfnt_off00006f64.bin
837a1176345d90c3a86415433271b8536bc39a7b0f96abaf0cc8063822bd5b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 10152 bytes

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