Malicious PDF — malware analysis report

Static analysis result for SHA-256 8712920ed93d2576…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 16:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34c938377b23b0ad0eba30e6c4c5c21 SHA-1: f07859dde1be092713d22cef3bd39f4ba3dbf1fa SHA-256: 8712920ed93d257676c8d9f3a2b9948758267a49dea95af53e20ac2abdf7eeb4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or redirection tactic designed to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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=the+notion+of+plasticity+refers+to+the
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/begum_rokeya_university_admission_circular_2020_19_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/6091/2282/files/tupuwilufesezozejimer.pdf
    • https://cdn.shopify.com/s/files/1/0435/7256/0031/files/vegetables_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/0541/1481/files/jeffrey_archer_best_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/9108/2918/files/64268744124.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/zezizijubikapalomusufene.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/belujof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6154/1014/files/firefox_report_deceptive_site.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/vapevuzip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/animation_3d_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/17266899158.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_off00007176.bin
9bc6f4d55a354dc2d36c05b76aff59bf695c4493816a1f6dd1108c3c9b57b40b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7176 5152 bytes
font_01_sfnt_off000082fa.bin
598efc05534adbccaa1dc7bf0331acb47627a258f410c57c96675c414e4430b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x82FA 10556 bytes