Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0702831cb8c7bac…

MALICIOUS

PDF

53.4 KB Created: 2020-09-04 22:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ea47c71470323e6a143e31894887ee11 SHA-1: d38d148be54b02fc0e0f5e81815043029b039477 SHA-256: d0702831cb8c7bac58569b844eb236f98177f53081fa7ca84abdf334e8105fe0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector, 'ttraff.club'. The document body, though corrupted, suggests a lure related to a 'Bsc civil engineering syllabus pdf'. This indicates an attempt to drive traffic to malicious infrastructure, likely for phishing or SEO spam.

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.club/pify?keyword=bsc+civil+engineering+syllabus+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/0dd040_7ebaed6443bc41d2b55fb20346d39310.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0286dd_cae5f47e94e541d184d915e090df404e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/035627_3b7e6d6fcaa54f82a1e59976b2e88716.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90423f_73c610115c8645e0a4b1da135c4f759c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dc8a8e_94114014ec6a40ef8b93f30c1c3a77eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_14adb31cc52b42c2910f88d46b30196b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fedf23_bcaa2f4fe6044dd2b4c55ac5f9680b83.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/43d598_e301fa2452c143ce9bb25e317b238051.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f7357_c7e40e98ffc24e85897664e550a3bd14.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/575363_c468d34614f544009550549179117c8d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/76698950627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/using_angular_forms_module.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4984/3868/files/english_grammar_brush_up.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5836/files/20485048229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4804/9572/files/pub_name_generator.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 5676 bytes
SHA-256: e48f50ea3d3107c2b0f22b71574c8a8c8b29e169bb14193e2f160bf251f36607
font_01_sfnt_off00009fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB5 12712 bytes
SHA-256: 1e5079a6bdaa10bd3f94a27fb0cb09f1f8ce468932f9ddd4896a0208d2a20873

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