Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e8cfb40310b897…

MALICIOUS

PDF

42.1 KB Created: 2020-08-15 01:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d87da4ac78bc152a8a15e55e5dc29dc2 SHA-1: d5c23725df0256b7847150e617fe4818026cb834 SHA-256: 29e8cfb40310b897a8f1c2e46819aa5d886e277474ed1da555a90e5dc150302f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems

The PDF contains a large number of embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary attack pattern involves redirecting users to potentially harmful websites.

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/pify?keyword=clarisonic+smart+profile+uplift+user+guide
    • http://saxema.kickitlivingweekly.com/uploads/1/3/0/7/130738720/detaniseviri_nupovuwufe_borininut_vonofa.pdf
    • http://files.gradgov.com/uploads/1/3/1/4/131409385/zuzugeki.pdf
    • http://bawel.code67.ca/uploads/1/3/1/4/131409090/2407326.pdf
    • http://wulokofox.saintpatricks.us/uploads/1/3/2/3/132302780/1862854.pdf
    • http://files.muskiechoir.com/uploads/1/3/1/4/131453904/mixuliz_javijiwox_bopumujoluxobav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/16399271344.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/11455546301.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/intoxicacion_fenobarbital.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/ravalunuded.pdf
    • https://cdn.shopify.com/s/files/1/0437/4472/3098/files/jawuwawir.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/zevupebafabaragiduje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8908/files/78287011057.pdf
    • https://cdn.shopify.com/s/files/1/0438/4076/6109/files/22399459849.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/juvamumetuviladedowufo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/26459090909.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/62469777281.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_off00006405.bin
1002157023c8bb076db6d85f9202e3580b5a2e8df29a3b6e388b94c449f54d84
pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 5380 bytes
font_01_sfnt_off00007633.bin
3eb4bcf6c41fc4b26b13c43750c16f02a78d75a23b22b912d16a2a26a41271ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7633 11080 bytes