Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fce26269836bef8…

MALICIOUS

PDF

49.2 KB Created: 2020-08-11 18:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5630a5f1b041e6258625666f68cbd47f SHA-1: 5452f0dffb4395255634a7de024ad057fa1bbbd8 SHA-256: 5fce26269836bef8242efd3bd6959607607ae1ac1a8c00c7a77fb06bfc928ba1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, suggests a lure related to legal forms, likely to trick users into clicking the malicious links. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm designed to obscure the true malicious destination.

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/pify?keyword=general+affidavit+form+california+pdf
    • http://files.e-fitpt.com/uploads/1/3/1/4/131410736/86b17e9d4.pdf
    • http://tefofu.operationhood.org/uploads/1/3/1/3/131381675/b3c8d302.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://files.jeanwhitfieldjewellery.com/uploads/1/3/0/8/130814115/tabez_sotekuru_pofadavukoxu_fuvikexabugiwaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/80301345460.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5515/files/benjamin_constant_livres.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/aletha_solter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/burunufujexog.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/tewalonatus.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/ramepogatosemikinotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/vutufotov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/what_is_a_thematic_statement.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/63692867736.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/bopenukapimovosabumasino.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/learning_bass_guitar_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/34199699639.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_off000081f4.bin
c4a0c9a56c00ea17cde3d50d69994256be4d9bcc71dc8292d36edf51c706443d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 5212 bytes
font_01_sfnt_off000093a0.bin
d1365713bc840a9d10016630edcd4107d80e25e6c47d3f45cb1346268c18e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 10812 bytes

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