Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4566a2a766b7ee0…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 18:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdbbaf48afe583e23ca644d8a3688364 SHA-1: 96e2d80984e46043bac9e426aa20135c43570483 SHA-256: e4566a2a766b7ee0967cb7bbeb628ac9ecd9b9251de17fd08691a98cbf837fa6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=autophagy+diet+pdf', suggesting a lure related to the 'autophagy diet'. The PDF also contains a large number of embedded links, many pointing to shopify.com, which is flagged as a PDF link farm. The ML classifier strongly indicated maliciousness.

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=autophagy+diet+pdf
    • http://dufoxowa.johnsinclaircustomcalls.com/uploads/1/3/0/7/130739625/6e1f3219a3d9267.pdf
    • http://files.crossfitantrim.com/uploads/1/3/1/4/131452794/mojoxizuwazeg.pdf
    • http://files.iwantmyjacketback.com/uploads/1/3/0/9/130969545/2590225.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/90763269035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/guzupogenamuvax.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/xozevuvuvidozig.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/tazixakasones.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/advanced_accounting_2_guerrero_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vekedexixerokasadoboma.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/fovanaxiresagakit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/fanukiwowunabopuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bapumonotirugapagemuzigin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/vexibev.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_off00007740.bin
953b318d1be2cb9301c0400fa2d0cb00d603f6d94449a5a7e76a154ad1aac156
pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 5088 bytes
font_01_sfnt_off000088a4.bin
e4a779a0fb1e65cfb791b9af0e72c1c9609e6f829401c358c5b72dcf9d6323a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x88A4 10088 bytes