Malicious PDF — malware analysis report

Static analysis result for SHA-256 a873ab32c9a8e389…

MALICIOUS

PDF

41.7 KB Created: 2020-08-28 02:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea327ac6bb8cc81af3c051895c0162cf SHA-1: d0727dd38531824b301cb29ef21f7ef00a67da73 SHA-256: a873ab32c9a8e389170857f7c6918ce769ee7a1c2f9e0b567f1a7f3ccd6808b0
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, ttraff.cc. The document body, though heavily obfuscated, contains text related to a '2009 volvo xc90 manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO spam or link farm tactics to distribute 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.cc/pify?keyword=2009+volvo+xc90+manual
    • http://files.selisterauthor.com/uploads/1/3/1/8/131871633/f8730.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2589/files/azerbaijan_visa_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/togejakenosupadomar.pdf
    • https://cdn.shopify.com/s/files/1/0447/7625/9735/files/also_sprach_zarathustra_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9121/files/income_statement_analysis_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/56347877420.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/zosoxikow.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/pexakopox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/37955651590.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/depazubuvupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5213/files/bioassays_with_arthropods.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/52820708653.pdf
    • https://cdn.shopify.com/s/files/1/0432/4576/4770/files/38650145046.pdf
    • https://cdn.shopify.com/s/files/1/0469/0500/0096/files/vedumu.pdf
    • https://cdn.shopify.com/s/files/1/0466/5887/9653/files/21249304007.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_off00006530.bin
3e2db3a4466b3961255d9c65a7395afbe2bde29e80b695f0c2b554c93cf60021
pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 5136 bytes
font_01_sfnt_off00007698.bin
5bb7d667be0ec82a3d88a56cca247c6c9f478969b3bf60174d4396b5241a94c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7698 10504 bytes