Malicious PDF — malware analysis report

Static analysis result for SHA-256 109704624b44b069…

MALICIOUS

PDF

44.4 KB Created: 2020-08-29 02:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 151c53796549c498e5ea0138d8d138cc SHA-1: 71e17680020a17782492d88e0abb45dd1e299e63 SHA-256: 109704624b44b069009f741dd18755fa96b0a9cd56e6fde3aa2689d68662b587
154 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to a malicious redirector disguised as a game cheat guide. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

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/wix?keyword=ufc+undisputed+2009+cheats+xbox+360
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_84eaaea3660d4c8ab7f4fd1c2f4ce3aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_72ac00d833ba4b14b2a37e71ec36f944.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a0647911b0d47e5a14ad61988378200.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a1106e07fa74690aa14897735df7630.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/keto_breakfast_cookbook.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ee74ab9be734382adc4f1d9a70bd5dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a90c7b58f684c54901b0f8fd0895bd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_94449c9086cb4f44896ca3bfaa8a7d87.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/annovi_reverberi_rmw_2.2g24.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/vosewowokelunowunijivifov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/musemipesofefonavaronu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/the_granularity_of_growth_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.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_off00006c9c.bin
f83a2f194f166bf59368dec815bb890dd41593d7b480490d03cf00df7c2a800d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 6064 bytes
font_01_sfnt_off0000812a.bin
94e83d7a12e11ad3dc7d67154ff2aad3c7392bdcdbb856e3e6afa524c1425c73
pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 10572 bytes