Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02c71b47b3d327c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 06:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f6027eef91e312a64e91a2339d57f8f SHA-1: 124ef3d7c51517b927e32440118fec521341e590 SHA-256: a02c71b47b3d327cea99f323eb47ea1c39fd55e133dc573b26a0843f1aa79281
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.ru'. This suggests a link farm or SEO poisoning technique used to lure victims. The document body, though heavily obfuscated, contains text related to 'capitalism android game guide' and the malicious URL, reinforcing the lure. No scripts were extracted, limiting the analysis of further payload delivery.

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/pify?keyword=capitalism+android+game+guide
    • http://sezadew.dgriffin.net/uploads/1/3/1/3/131383444/gesesin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/56640856685.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/class_one_cavity_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/vukol.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/10266053794.pdf
    • https://cdn.shopify.com/s/files/1/0450/6163/6259/files/akuntansi_manajemen_rudianto.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/42881191321.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/nissan_connect_services.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/85172347570.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/bollywood_party_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/kavadakewasegakikibopunur.pdf
    • https://cdn.shopify.com/s/files/1/0435/8435/6507/files/29337582317.pdf
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/yamaha_outboard_owners_manual.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_off0000650c.bin
859c45f743186075e4c84f405adb1d7404a05c2d7b884740f41c895d082182ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 5184 bytes
font_01_sfnt_off0000768c.bin
7ebc136f9706a0a153901062662ba39c09a34fbae0bf4531421ff7bffd43e11d
pdf-font-stream PDF embedded font (sfnt) at offset 0x768C 10260 bytes