Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9a4074c1630254…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 10:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5643bb6eac08662ed91b5a568bd0e402 SHA-1: 5767c6b9e448d209ad92cea883ecb2c5a4ee5c54 SHA-256: 0b9a4074c1630254526ba76239b48d3cf6bbb6dddcf8e76063ce31438cc36205
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to a URL associated with malicious redirector infrastructure, specifically targeting keywords related to weight loss. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic. The ML classifier strongly indicates malicious intent, likely to drive traffic to the malicious 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.cc/pify?keyword=metformin+helps+weight+loss+pcos
    • http://files.saintpetersriceville.com/uploads/1/3/2/3/132303099/7796715.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/pathfinder_kingmaker_weapon_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/sindh_anti_corruption_act_1991.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/72319174638.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/jupomudasujulusavaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/arbeitsvertrag_zum_ausfllen.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/51412614126.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/61912002478.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/vepemedomufefojibur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/37550870483.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/nyamuk_anopheles.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/that_s_a_christmas_to_me_mbmbam.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_off00006bc9.bin
f87b32a3454373ce0cb382395921fb9c8012394bdc37cb1e3abc51b8f63af408
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC9 5316 bytes
font_01_sfnt_off00007dd8.bin
421ddc55ae2b53af8f899bbc1b4c5e0ec0d094743dfe87d05f8b668dcd040df4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 10688 bytes