Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4bda9538b75dd4…

MALICIOUS

PDF

69.7 KB Created: 2020-12-18 07:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e3e7bd6b170f28ae088501130e287ee9 SHA-1: ff231b59044b08400d3de82a657322748402c6ea SHA-256: cf4bda9538b75dd41b51e9c7ec34412296b853defa9470b7d66405e63376d9f9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. The ML classifier also strongly flagged this PDF as malicious. Although the document body is heavily obfuscated, the presence of a malicious URL suggests a phishing or redirection attempt to a malicious site, likely to deliver a further payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/strik?utm_term=bosch+power+box+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_5fd81191dd34c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455901/normal_5fa7c7fe9de21.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/5fc19fdcbd14ff0dd2a1cd42/t/5fc47641cb3e0f5771deb954/1606710850723/kodituxevemobuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a245041e-953e-4c19-935e-220382680fe3/manualidades_para_vender_en_el_colegio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc100ee92c50b1a1e781c95/t/5fcdf98f7ae85b53b2b6889e/1607334288559/scent_of_a_woman_tango_quote.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf64b8eaf37e3b6493d3c2/1606378681724/81051127060.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc99231822fbd3263d7723e/1607045682386/are_happy_shopper_burger_bites_gluten_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ecedbf71053ccb1052a5/t/5fc27299f3de5e49b5b3a49a/1606578841416/edtpa_task_3_part_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a1f057-174d-4acf-b816-6366ace4faea/josixow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f349e2fce462bca5d5b8/t/5fc7a5510791337046ec107a/1606919506809/nyc_neighborhood_crossword_clue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b833bdec-4657-44c0-b7df-7c60587bcef8/eyeglasses_morristown_nj.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_off0000d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 5336 bytes
SHA-256: c068bd1135d4b5394604b769b3fb1b212821b3b22147cc6807b2e458b1e55445
font_01_sfnt_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 10980 bytes
SHA-256: 1354f6523246ade393277be43fd8d941bf1dd549985e3d54f3219e828b2dcf26

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