Malicious PDF — malware analysis report

Static analysis result for SHA-256 6964947047448c98…

MALICIOUS

PDF

52.1 KB Created: 2020-08-30 03:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6781535e524c0e2844f3bd38ba66e160 SHA-1: 8d1e322cbf3618ec6ec1923049688daadc663e80 SHA-256: 6964947047448c980b1870b1e23124d86ad8499faf2fce9864c1b83e5f5d3c4c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a phishing or malware distribution attempt.

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=ck2+republic+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/0896/4246/files/3753468101.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/tusilogaledugugujalukixo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/memomagovan.pdf
    • https://cdn.shopify.com/s/files/1/0450/3745/3470/files/subject_verb_agreement_worksheets_grade_3.pdf
    • https://static.usrfiles.com/ugd/bb13a2_e4dcf58a265e47018f51586fb97c84ff.pdf
    • https://static.usrfiles.com/ugd/e02969_451d053fbad84861bee652e15c0435b3.pdf
    • https://static.usrfiles.com/ugd/b91566_9585411c40134fde80bedc198231984c.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/sudoku_para_nios_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/56764385484.pdf
    • https://cdn.shopify.com/s/files/1/0429/7831/2355/files/61602257981.pdf
    • https://cdn.shopify.com/s/files/1/0461/8960/9109/files/singer_sewing_machine_curvy_8763_man.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/envelope_printing_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f97.bin
1822584cd256ced86bb55b3c3904bec84b45052954aa27dfbc9dd39e0707d205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 4796 bytes
font_01_sfnt_off00008fe6.bin
f91a009ad45db2be145acdd2c007f0da6c7e9ab6895729968f65e83667492480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE6 11096 bytes
font_02_sfnt_off0000b548.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB548 4324 bytes

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