Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ff1696a2fdc4c5…

MALICIOUS

PDF

65.8 KB Created: 2020-09-01 06:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9a525607f64c012de36ab9b94ff23e SHA-1: 2ef22a146299c78bcb63adbf404de313b6153ac9 SHA-256: 60ff1696a2fdc4c59c0302c491529fc5f1122176ab29a2f185ea41dca32277a8
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to SQL queries and the authoring application, suggesting a lure to a malicious site. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to distribute the malicious link.

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/wix?keyword=all+basic+sql+queries+commands+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/67960667437.pdf
    • https://cdn.shopify.com/s/files/1/0459/9424/6303/files/puditose.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/commandos_1_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7637/files/sop_deviation_report_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/9036/8929/files/bishop_bullwinkle_hell_to_the_no_no.pdf
    • https://cdn.shopify.com/s/files/1/0428/1620/9059/files/69852661734.pdf
    • https://cdn.shopify.com/s/files/1/0457/3754/1798/files/mymaths._co._uk_online_homework_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/vitamin_b12_deficiency_nejm.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/53341766088.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/98252753435.pdf
    • https://cdn.shopify.com/s/files/1/0432/0054/4931/files/jakudejalopotujesaburiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/wemope.pdf
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/63142259150.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/fagoxodogewajeziron.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_off0000c13c.bin
67255e9abb798844884ac247e5adc4996352d09d7a20ab6e0b51006a4e1f4839
pdf-font-stream PDF embedded font (sfnt) at offset 0xC13C 5556 bytes
font_01_sfnt_off0000d402.bin
227aba19a063f6c67ebc209fb82d54230211b05e6c9479b56a0f5394ae9f98a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD402 11752 bytes