Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc4b0df4a1f6066…

MALICIOUS

PDF

39.6 KB Created: 2020-08-14 23:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49e123c79e6ba532872875522fd9bb4e SHA-1: b0b29d8ea7825b989d703c4b04753c68151a4a86 SHA-256: 6cc4b0df4a1f6066275973bc2a013c0640f86a24f35440c807cb6bd5c2c80391
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for downloading a driver, which is a common tactic for malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing attempt to redirect users to 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.com/pify?keyword=driver+microsoft+bluetooth+enumerator
    • http://files.elleavivnewton.com/uploads/1/3/1/4/131482953/962d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/4341360138.pdf
    • https://cdn.shopify.com/s/files/1/0447/6187/4583/files/arquitectura_sustentable_articulos.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/kuzujaxodafowimot.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/forescout_counteract.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/gate_2020_syllabus_for_mechanical_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0439/4670/5051/files/bromination_of_acetanilide.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/faxitelit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/91010688531.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/73625234929.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/refipuwamakuwagunu.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_off00005d89.bin
3eb92d3e0eed6c00cc7f12d5312c9545d4d8650099b1384fe7a31d30429ef435
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5320 bytes
font_01_sfnt_off00006f80.bin
18c534500d2d0062fada35463fbeddddea55b5493afdba1abe67031fdf5da57b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 10080 bytes