Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bdd37adfb16b23…

MALICIOUS

PDF

40.2 KB Created: 2020-08-02 16:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d40b747bdacf77ad55b86af8ce51ff69 SHA-1: 44c8058f22e6e61535bcd130fca07ca35830481b SHA-256: 03bdd37adfb16b23a8b21965758df62b48465b8c501b518167ebf137003279da
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 external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent link directs to a known malicious redirector infrastructure, likely intended to lead the user to a phishing or malware download site. The document body itself contains text related to driver's license acquisition, serving as a lure.

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/wb?keyword=chestionare%20redobandire%20permis%202019%20pdf
    • http://files.shagwayartsbarn.com/uploads/1/3/1/6/131607010/4737319.pdf
    • http://files.salentoby5.com/uploads/1/3/1/0/131071258/wanow-dofoneruratobom-lalivakiba.pdf
    • http://files.cardiffbachoir.org.uk/uploads/1/3/1/3/131378968/pekir_miwuzabadex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4411/8428/files/xokonigawewapit.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/54931477514.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/6899451290.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/gefibowaxusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/lopapabusolabefudafumezu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/brothers_in_arms_3_sons_of_war.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/31770395219.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/87358629906.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/81817931441.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_off00005c92.bin
7d4251ff20080f9efe384e7ea489820bd54aed35ae44a576c3cd5478b085797f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 5776 bytes
font_01_sfnt_off00007002.bin
d3d50c264ddb138e6987f3858c1e6b9d75c0aaa6a7ccdef3d97fa01488899ebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 10872 bytes