Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb174b1a3d5f97d2…

MALICIOUS

PDF

43.5 KB Created: 2020-08-31 01:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8cc95920a8e500529fb8d8c8576511e SHA-1: d73256baa8a2cb7e45c3d8f949b2dfa0e7316caa SHA-256: cb174b1a3d5f97d28531ef83a79731460374e924c3a495bb51f962615f13e2eb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link disguised as a 'Gta v online guide book' that redirects to a malicious URL (ttraff.cc). This URL is flagged as a malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious content. The ML classifier strongly indicates maliciousness.

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/wix?keyword=gta+v+online+guide+book
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/mamakupipire.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/dragon_ballz_budokai_tenkaichi_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/seerat_sahaba_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3722/8188/files/vocabulary_words_with_sentences.pdf
    • https://static.usrfiles.com/ugd/1a89c8_9390ce32eb2049c9911b396b51aea619.pdf
    • https://static.usrfiles.com/ugd/99965f_e1da90d76f0d404aa88705e46edee72d.pdf
    • https://cdn.shopify.com/s/files/1/0457/7692/8924/files/rotator_cuff_exercises_with_band.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/xobatiroremomarasupemowom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/15534505111.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/rilevosevubodurawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/muridawimojokaganagir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/99797519105.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/bucket_list_full_movie_720p.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/gelukajemiridaxa.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7b.bin
55eab67a1e7bb5211cfb542462d11daf191b078b106493d90329e3d0d708c898
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7B 5012 bytes
font_01_sfnt_off00007cac.bin
7e537c0446bafe865c937abac3c97f1f33aec039c0806a0fd64399365d49b154
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 10768 bytes