Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c403f88e826f81…

MALICIOUS

PDF

38.2 KB Created: 2020-08-25 09:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20990726bfe48748d10a219a40317c1 SHA-1: 97245d22a331d304f2df35672f59d052c48f6168 SHA-256: 04c403f88e826f81d3e20e95218b96050bce0a563525b1767165e4157d7b4519
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=free++tik+tok+app+for+pc'. This suggests a phishing or scam attempt, likely using the lure of a free application to entice clicks. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=free++tik+tok+app+for+pc
    • http://valekase.theamplifyfoundation.org/uploads/1/3/0/8/130814017/wolipelir.pdf
    • http://gobulo.ywcahealthandfitness.org/uploads/1/3/2/6/132681481/d3d4075199.pdf
    • http://files.sandifie.com/uploads/1/3/0/9/130969461/fosafeborijop.pdf
    • http://files.greatcommissionalliance.org/uploads/1/3/1/4/131453276/0e58ed5ab19d4b.pdf
    • http://files.francespanunto.com/uploads/1/3/2/7/132710624/jafolafomo_mosifuxip_rusavil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/canada_elections_platform_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/jesijozifoxinexuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/13408222906.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/saddle_club_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/caverna_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/varulepomelanetinaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/accounting_definition_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0704/files/it_equipment_inventory_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/2328/3862/files/kinds_of_sentences_worksheet_for_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/14976812876.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/sbelts_miss_waist_trainer.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_off00005aa1.bin
b7d940b3d2f9fd6d6a08ee949d1b12280d18194ac95b985503a9300fc85bb35f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA1 4820 bytes
font_01_sfnt_off00006b19.bin
3b0c64460416487628b8495abc1acc41d49f4537a00367238aee7b421491dc03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B19 9628 bytes

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