Malicious PDF — malware analysis report

Static analysis result for SHA-256 174241807d157856…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 07:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7505f2c30d206921d01007b32ee6194 SHA-1: d7fd12f9586f07d0c2357e8ea3ff35460ee479b9 SHA-256: 174241807d157856f353feebe19330d8576abcfa6b84d930d666323088352c49
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/wb?keyword=types%20of%20electrical%20wiring%20system%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm strategy to obscure the malicious destination. No scripts were extracted, but the malicious link is sufficient evidence of a phishing 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.com/wb?keyword=types%20of%20electrical%20wiring%20system%20pdf
    • http://kemat.anarchydieseltuning.net/uploads/1/3/1/4/131406381/c13fa.pdf
    • http://files.alvinmark.com/uploads/1/3/1/4/131406855/2121a.pdf
    • http://navuxines.napasugar.com/uploads/1/3/1/3/131380983/6931403.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/roponujusapanejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/99236031517.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/57619212517.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/pmbok_guide_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/43444510087.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/febixabubabexogoravo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/49191905325.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/fapodosikonef.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/ribew.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/tukamimupoberip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/shimano_altus_fd_m310.pdf
    • https://cdn.shopify.com/s/files/1/0438/5947/6630/files/66904845021.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/relatrio_de_auditoria_financeira.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_off000065f6.bin
15486384d84b773099234bc9340d76a024fb472896669be77318584a2b280d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 5620 bytes
font_01_sfnt_off00007910.bin
77bef9ddf13985dad0b0b5f9c6b903f653f2ce317d11d47fa42474007faf91b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7910 10556 bytes

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