Malicious PDF — malware analysis report

Static analysis result for SHA-256 008cb2a47e00bec9…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 01:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c3a95a84bb491a80795669a6b3a787a SHA-1: b954175ecd2fda3aeb1f1156203c2874a34d7750 SHA-256: 008cb2a47e00bec906eeb284013217c68bd30ee8793915a43daf9c7bad1de296
162 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting an SEO link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to distribute further malicious content or phishing pages. The document body also contains the same malicious URL, reinforcing the intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=christmas+letterhead+templates+word+free
    • http://files.romaredux.com/uploads/1/3/0/7/130775520/rilolime-xowiwom-mizunixugavij-devib.pdf
    • http://watanot.slcmassage.com/uploads/1/3/1/8/131856149/tajexukodini_jedabife_jifinozad_vorijafalifido.pdf
    • http://files.usafa70.com/uploads/1/3/1/4/131437139/48df3fef1.pdf
    • http://files.hesedyoga.com/uploads/1/3/1/4/131455475/314864.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/14077611243.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/aditivos_alimentares_tipos_e_funes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/geometry_calculation_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/79683201495.pdf
    • https://cdn.shopify.com/s/files/1/0446/3663/5299/files/busbar_rating_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/21728556612.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/ielts_academic_writing_task_2_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/pagajepovisadabisige.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/16337907342.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/92574180043.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/potusunuguko.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/kujawudalepajerum.pdf
    • https://cdn.shopify.com/s/files/1/0457/7093/2390/files/cognitively_guided_instruction_math_problem_types.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_off000072de.bin
103ef845362fe54f7f75a39b7185b44ac75c0dc2a49f34f683d6d495a2a3d799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 5276 bytes
font_01_sfnt_off000084b5.bin
aaf2bffd9b2bc74d6329bc659155b63fe76dc0df4951e4edc32a497b76abd49a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B5 10332 bytes

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