Malicious PDF — malware analysis report

Static analysis result for SHA-256 5beeb6d9cc0383d0…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 20:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5738eff6b56a54d798e2b14047cc87da SHA-1: 4ee813f7a333abdd8b4bcf88d2ac2b1f61eab813 SHA-256: 5beeb6d9cc0383d02c59b2630f1bb857487403fdbe1c2eaf442cfe9e02d2b20f
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though obfuscated, contains text related to bug reports and a URL that appears to be part of a link farm. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to lead users to external, potentially harmful, 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/wix?keyword=send+bug+report+to+mi+for+analysis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0452/9052/0738/files/64187340222.pdf
    • https://cdn.shopify.com/s/files/1/0434/6049/3474/files/mimano.pdf
    • https://cdn.shopify.com/s/files/1/0430/6334/5301/files/savage_arms_shotgun.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/70437390628.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/reference_letter_template_for_fellowship.pdf
    • https://static.usrfiles.com/ugd/2f07a1_a439a8cf8fdf4eb5af06b246d2d043fb.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/29565442301.pdf
    • https://cdn.shopify.com/s/files/1/0439/8258/6014/files/19770610522.pdf
    • https://cdn.shopify.com/s/files/1/0431/9127/1586/files/kopirusalarenanajo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/functional_testing_examples.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d9e9592253e44b8b58d25baa5b756a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_de9313b406d64784937543534630954f.pdf
    • https://static.usrfiles.com/ugd/b8c837_404531e346b44571b85ab469ac98a2ca.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_off000068a9.bin
4881e92e100307d5f63d4f55a4e8c5ddb489f0a35c87f6cfc4368ba125726aec
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 5704 bytes
font_01_sfnt_off00007c00.bin
4b87b8489150e884c3699a882cd6b7dd93afa5db6c40d3f1f72a94c3b330ad90
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C00 10176 bytes