Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac5990c15c8c8f3…

MALICIOUS

PDF

72.6 KB Created: 2020-08-26 08:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0a7ce74876cea5302b8c8393d11969d SHA-1: c93a189de9f5a85f3eac6853a91803da60623524 SHA-256: bac5990c15c8c8f34ae9348725f56da6c4616f94c223bf2130458ad874c1b7c9
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially garbled, contains text related to 'ABD'de yap1lan kenevir ayakkab1lar1' (hemp shoes made in the USA) and the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or distributing 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/pify?keyword=ABD%2527de+yap%25C4%25B1lan+kenevir+ayakkab%25C4%25B1lar%25C4%25B1
    • http://files.tessonwueme.com/uploads/1/3/0/8/130874162/28421f895ef0eb1.pdf
    • http://files.colleeniversen.com/uploads/1/3/0/7/130739678/paxiwi-marewigiwulami-lozerasogutuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/94732351021.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/11561274440.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/qsofa_sepsis.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/38410847803.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/maxefasevudepugibon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/voref.pdf
    • https://cdn.shopify.com/s/files/1/0445/8492/7396/files/acta_constitutiva_asociacion_civil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/xodofatisowuxiju.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/ballade_to_the_moon_daniel_elder.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/familial_median_canaliform_nail_dystrophy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tobilefoseparavako.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_off0000d9fb.bin
544f10ad0695a0735d9f3bdca7c7670f3a57b12912385b6bb3234a85b16aa241
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 5432 bytes
font_01_sfnt_off0000ec99.bin
c47820e4e5567ab10b54df62a172002be51e8fd8a26f1871c108c3279552fda9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC99 12544 bytes