Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe34b8a4d617cfe0…

MALICIOUS

PDF

39.2 KB Created: 2020-08-15 00:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec000fa14e6ee6fcfffb2293d538d221 SHA-1: a13fe4981caabc54fb39d87aa40c3cc135a05477 SHA-256: fe34b8a4d617cfe0eb188eb79a4f0bd9672a10050082a1717fc7ec737a6ec775
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link redirects to `ttraff.ru`, which is flagged as malicious. This indicates a link farm or redirection strategy designed to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact 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.ru/pify?keyword=schoolboy+q+oxymoron+zip
    • http://sugol.coldwatersoapco.com/uploads/1/3/0/7/130738798/tikusojela.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/63422546669.pdf
    • https://cdn.shopify.com/s/files/1/0440/5752/6437/files/bowlby_and_ainsworth.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/2705448111.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/printable_calendar_2020_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/fj_cruiser_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/uefa_champions_league_fixtures_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/19594525222.pdf
    • https://cdn.shopify.com/s/files/1/0443/8815/5558/files/importance_of_public_speaking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/85409528863.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/boboli_gardens_map.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d06.bin
d25dbd8ec1a6122f351ffc5684b3245bb6faf2d7e0de3a82bd117dbd3e250302
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D06 5372 bytes
font_01_sfnt_off00006f39.bin
0d7519c1ef717e7492b5cb0efc03b2c424c99613bed475e24a55aa5a1f38f6ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F39 9664 bytes