Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7ee3677461911b…

MALICIOUS

PDF

52.3 KB Created: 2020-08-23 23:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a444568958ed469e44945130994cd4e SHA-1: 19aa3e6c414e5c698d01368a69174cd533479956 SHA-256: 6c7ee3677461911b6b86927e5e4ec8bdf9c9f888e06c3a5079bd2890e1634f19
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that suggests a lure related to 'Speech outline template google docs'. The presence of many external links, including benign ones from Shopify, indicates a potential link farm or SEO manipulation tactic to disguise malicious intent. No scripts were extracted, but the primary malicious behavior observed is the redirection to a potentially harmful URL.

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=speech+outline+template+google+docs
    • http://nufiduka.northwestiowatournaments.com/uploads/1/3/0/8/130814328/361aad14.pdf
    • http://files.jackpotvapr.com/uploads/1/3/1/4/131437977/kemeteg.pdf
    • http://files.saraayllon.eu/uploads/1/3/2/7/132741225/f64907c28.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/42159288028.pdf
    • https://cdn.shopify.com/s/files/1/0435/2838/8767/files/essentials_of_pathophysiology_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/vakofeseburuwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/68764845799.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/fojejeganakorawoputi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9477/6739/files/33130464292.pdf
    • https://cdn.shopify.com/s/files/1/0434/0082/2934/files/bye_bye_love_ukulele_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/89518306040.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/kurabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/86906589423.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077c3.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 2828 bytes
font_01_sfnt_off000081bd.bin
73e532ca96b77f0e436ec6b8d89d6d8c5b3546679ec4a7bf393098412becdf44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BD 5376 bytes
font_02_sfnt_off000093cd.bin
c685d32e3bd168a5df61483ae7f5d607f9dbac0cb28c4c396c0180bad7fbc8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 9828 bytes
font_03_sfnt_off0000b572.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB572 4324 bytes

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