Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7e57c5d6fa0a11…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 01:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 526f504286b1437e3a1310cb9845007b SHA-1: 73c10467024a47c9c2dc51133f5633413c01726e SHA-256: 0d7e57c5d6fa0a11a0c6d6faded4c4a884ae04dc9ed4cca2dfa43f270c02d006
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, suggesting an SEO link farm tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=harbor+freight+manual+battery+charger'. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, reinforcing the lure. No scripts were extracted, but the presence of malicious redirector links and the link farm technique strongly indicate a phishing or scam attempt.

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=harbor+freight+manual+battery+charger
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/annamayya_full_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0463/2487/5419/files/57412193429.pdf
    • https://cdn.shopify.com/s/files/1/0438/0049/4241/files/lonuzojipixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/7443843439.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e146d0eb4fd48cd9c641ffc48614c7a.pdf
    • https://static.usrfiles.com/ugd/8acad3_7f92f88e568e4791880a3038e2e58b52.pdf
    • https://cdn.shopify.com/s/files/1/0458/1448/1062/files/handbook_of_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/lelasusipor.pdf
    • https://cdn.shopify.com/s/files/1/0431/9589/1871/files/purupajamilebekepegif.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/xepukowegeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/ziterigumevegesen.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_off00005bbd.bin
5036d32c4e8458aedbe318f8723213d2f54fe3ac6804282bd4a5242799b4eb44
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBD 5320 bytes
font_01_sfnt_off00006dbb.bin
c4c8a9d13a74d4f683d2a95d50e78fa5f161e055d5480ee461e300003cd539c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBB 10676 bytes