Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcffd124bba0505…

MALICIOUS

PDF

48.3 KB Created: 2020-08-15 03:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7eaa4b2a54fc28fe4b09ad71848a28cd SHA-1: 880c09843c81c3991ca148b3472e9a9b6f4e63de SHA-256: 5fcffd124bba0505d74352bfce7540fdf05406f9bc48aea9b521953bef96f216
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL hosted on 'ttraff.ru'. The document body, though heavily obfuscated, appears to mimic a legitimate document related to the World Economic Forum to encourage clicks. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=world+economic+forum+4th+industrial+revolution+pdf
    • http://latinoxe.davidfrankdesigns.com/uploads/1/3/0/7/130739629/1566447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/bekuvozagupisosijafode.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/employment_agreement_letter.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/bibigukujite.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/24009097942.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwofejimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/9687465686.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/paxunibumamemovolep.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/95373279411.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/kujuwegevivitofudenozuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/doyles_guide_criminal_law_nsw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/kafigukamimotajaxelox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/zuxezabutamofexek.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_off00007f91.bin
61731c5c2aca44dfb76ff2673d39ff2d31cdd7a5a83360d77c3c24456a1893db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F91 5556 bytes
font_01_sfnt_off0000925e.bin
c533d6a19a4e7d05d9cc224d8c4c994bf3937f9a810f314d0fbc5c541998796e
pdf-font-stream PDF embedded font (sfnt) at offset 0x925E 9836 bytes