Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca65d1f791657d0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 15:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1abeefb5fae60d1909a5c6cde3c7d3ad SHA-1: 5180751c8fd08192f80580d36712ac1d67bbaa8d SHA-256: 0ca65d1f791657d0ef2a567886a943156afbcee5e8424dc0a46214a3b3463812
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, a common tactic for SEO poisoning to drive traffic to malicious sites. The primary malicious URL identified is https://ttraff.com/wix?keyword=yale+forklift+service+manual+free, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

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=yale+forklift+service+manual+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/29137661206.pdf
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/wulexeditidugofezemimos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/7291765107.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/libros_de_cabala_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/38185676415.pdf
    • https://static.usrfiles.com/ugd/67e251_9003df94a81545f38a7670c96e569467.pdf
    • https://static.usrfiles.com/ugd/4d6844_078e7972c9ed4f4c9b8ec75d56207fb3.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/46503468900.pdf
    • https://cdn.shopify.com/s/files/1/0434/8814/9654/files/who_guidelines_for_acute_gastroenteritis.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ac287dc92f407fb616400383bbedd3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e95fec18a414b6698e1d9e79c1d23d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e4f217def14a49a6bad2a3b6129161.pdf
    • https://static.usrfiles.com/ugd/b8c837_113321a4240248e5a9ef02794b89c394.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8aad556fdf04239a4a20cfb2279dd52.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_off00005e19.bin
ada877500ce0b2b91bd5a921a7923a9925c223e63c652adbd01c761818f1c2f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E19 5112 bytes
font_01_sfnt_off00006f71.bin
67983700d885613cd350c15e1b83bccb03a7ec66e0784bde124a574763d87349
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 10304 bytes