Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5c86d1a56394c0…

MALICIOUS

PDF

48.2 KB Created: 2020-08-19 16:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77939a69f0e5ceab1491be309c709677 SHA-1: c1af75b39d0cb3056b8ccf053a4d2716fdb9ce6c SHA-256: 6e5c86d1a56394c014be9ccc7bd7e1402e658e6d8c49138677488eb472f536ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link disguised as a video song title, which redirects to a known malicious URL. This indicates a phishing or social engineering attempt to lure the user to malicious infrastructure. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic.

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.ru/pify?keyword=buddha+hoga+tera+baap+video+song
    • http://files.appliedbiochemists.com/uploads/1/3/1/6/131606046/8803598.pdf
    • http://zetil.fffco.org/uploads/1/3/1/3/131378950/3a92a07.pdf
    • http://files.herrimanhighchoirs.org/uploads/1/3/1/8/131871642/9583670.pdf
    • http://files.fremontdebateacademy.org/uploads/1/3/1/4/131407227/nesilasukepagorog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5864/0534/files/26495981248.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/lelumeretawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/70952877664.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5424/files/24096963389.pdf
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/interview_questions_and_answers_for_structural_engineer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/74745338195.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/fenuwexopiwipij.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/98644194901.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/319051996.pdf
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/headache_classification.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bolosenisom.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/60992532270.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b0.bin
ecb267b7d11418b49c839666cbe665a440926de56067d808ce47f0a06b44edb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B0 5436 bytes
font_01_sfnt_off00007b2a.bin
4f7b002b38a956b47ca456624983f32f78e1fae11e66e4a475946db1806dc7b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 10204 bytes
font_02_sfnt_off00009e60.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E60 16164 bytes

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