Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eb01c621ca5009…

MALICIOUS

PDF

44.2 KB Created: 2020-08-25 23:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5756d2b92ff9a55a5d563bc76aea6f5e SHA-1: 9770747cb3c4ab00580fa40ce717b4e334844af0 SHA-256: 75eb01c621ca500979bd4a2adf55527ca27a5d308012645d11951cd4a3ad509a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also hosts a large number of external PDF links, many of which point to Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

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=demon+scar+dark+souls+3
    • http://dekubuli.mpcaa.org/uploads/1/3/1/1/131164250/xonuw-giroporosamob-bikidibaj.pdf
    • http://jisivi.kingschapelashford.com/uploads/1/3/1/8/131856408/cbfca.pdf
    • http://bazopeziz.mauricedental.com/uploads/1/3/1/4/131406893/roganedukixivepusuxe.pdf
    • http://refur.lindseybarlagthornton.com/uploads/1/3/0/8/130873954/596445.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/jizuwowemofum.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/70032755328.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/puledofeposopek.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/jan_richardson_guided_reading_next_steps.pdf
    • https://cdn.shopify.com/s/files/1/0434/1779/6775/files/mezawaborudevu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/mathematics_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/46333613200.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/buns_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/ziserebibitonemigegeki.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/58203612927.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/gikegilenamedomoled.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_off000063f0.bin
632dc6a5391f88c1fbfc8290f879b25236caa4b22fd7854912008efdabeaba4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 5312 bytes
font_01_sfnt_off000075e1.bin
c1b3d7b17c4a1955fc20df5de4416b4bbc2f1d61bc4f7afb157a89c2c49c29de
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E1 14892 bytes