Malicious PDF — malware analysis report

Static analysis result for SHA-256 883de199cbe36d1d…

MALICIOUS

PDF

35.7 KB Created: 2020-08-29 21:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 827b4dc81d3b14ecc0e1e5f7e8a1469d SHA-1: 5461fbc7438bcffac3a02c307abdfe23037204e1 SHA-256: 883de199cbe36d1d2517730c368b8a291c7246cbfc340543ecc210182a1f5552
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=hyster+50+forklift+manual'. The document body, though heavily obfuscated, appears to contain text related to a forklift manual, suggesting a lure. The presence of a large number of external PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirector.

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/wix?keyword=hyster+50+forklift+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_8b19053dcb8b430fa29ae142c58b6a2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bcdf6cb6138444387f37b9c07b1e985.pdf
    • https://static.usrfiles.com/ugd/b8c837_f700d46583144fc38939bec58969a510.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/kebocode_com_gift.pdf
    • https://cdn.shopify.com/s/files/1/0438/1510/8765/files/91575339416.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/voruxetupunow.pdf
    • https://static.usrfiles.com/ugd/b8c837_95e37550f5e44b318819e444bdd307da.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cbf90df8ae845fba507f72abba8354c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8181ecf9b67a4778851c6014f020d734.pdf
    • https://static.usrfiles.com/ugd/66c878_352f317974dc46eaa34f271c0113f901.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aa831ffa1ee41eca5ec82483d40b280.pdf
    • https://static.usrfiles.com/ugd/b8c837_c051c2ad37c547e49deeae9af09b1a8c.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_2f6fe2444f3f4f98aa0e06ed24f3fc26.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ee1c28aca8949a5a4f2c35802287cec.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_off00004c1f.bin
298fe4ada6f7278a53fbf23f8b556f73b53c313327f2a66e7174b668f795c85a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1F 5308 bytes
font_01_sfnt_off00005e1e.bin
324c7ca49ffcfa39ab9e439fc642a5a48873ac6c31305c16b6a1c1813eef6993
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 11228 bytes