Malicious PDF — malware analysis report

Static analysis result for SHA-256 7189b08034af4e95…

MALICIOUS

PDF

50.5 KB Created: 2020-08-15 00:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d11a6bd11748f110b926eba4075c548 SHA-1: d217e6f6993ca9c6dd2fc6c9fba3af3876251886 SHA-256: 7189b08034af4e95939587a9df744da1b43f3faff30625e1a652f14337d3c25a
174 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating an attempt to lead the user to malicious content. The document body also contains the redirector URL, suggesting it's a primary lure. The presence of multiple PDF links points towards a link farm strategy, likely for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=discovery+channel+tv+guide+uk
    • http://files.nitinagrawal.com/uploads/1/3/1/4/131406736/225953c.pdf
    • http://mopabuf.massage-solace.com/uploads/1/3/1/1/131164250/garuwufozogeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/duxuzalurefodazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/95818168647.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8139/files/89945231876.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/bebakanetekugevofezisejom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/alimentos_para_diabeticos_e_hipertensos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/serananovuja.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/wakomatuno.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/26476743231.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/metroid_prime_2_walkthrough.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_off00007f73.bin
ee003038404859cfaff5218c552acd65eca79e3128f195256bb4ee3148674100
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F73 5424 bytes
font_01_sfnt_off000091e7.bin
f5b337c8fafeb95d6ec037cc713e03d0eb51e14afc20521dbe976576cc14e3fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 13748 bytes