Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffeb480159956382…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 18:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eeccba52251c80ab51eecf50cf0cdb9 SHA-1: 65abbc09b5d4b6b25a7d98f717b2430e2ba59649 SHA-256: ffeb480159956382859462db56fb2b3dc77c1bdfec08c41dff3f0ebbc083eeda
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The primary malicious URL identified is https://ttraff.com/wix?keyword=gloria+anzaldua+borderlands+audiobook, which is likely used to redirect users to further malicious content.

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=gloria+anzaldua+borderlands+audiobook
    • https://static.usrfiles.com/ugd/7d21c0_8622999a6d83449b8c7c991cd7aeecea.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da2dc5df60c4aa28a00aed2239a116b.pdf
    • https://static.usrfiles.com/ugd/b8c837_76758413ac8b4756a5640b3d42018e38.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/fowetuvinadejadase.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/numezeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/sezotunuxurasugokulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/anexarea_crimeei.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/povumad.pdf
    • https://cdn.shopify.com/s/files/1/0432/0457/5387/files/best_pokemon_game_for_android_gba.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/89924954584.pdf
    • https://cdn.shopify.com/s/files/1/0437/9099/1521/files/barron_s_ap_calculus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/60901432285.pdf
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/benowujazivezoramamad.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_off00005906.bin
faead397194e5b42addb11f8a2aa32ea8df1be6722c1cd07ba042c7779e35389
pdf-font-stream PDF embedded font (sfnt) at offset 0x5906 5104 bytes
font_01_sfnt_off00006a75.bin
775737e50d5407ef22da5c13a828691ab76897e45241c0fb395a745f485a9f0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A75 13228 bytes