Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2d84aca96e1630…

MALICIOUS

PDF

51.3 KB Created: 2020-08-20 19:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e6e09cabfe1e205caec46a3d9f646ac SHA-1: 8756d85735124521771d123970416760cbcb615f SHA-256: 5d2d84aca96e163094ade80a9b4a5644d88fce5cc931a2207f2f3a87861c8d64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.cc'. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted from this sample.

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.cc/pify?keyword=artritis+reumatoide+pdf+inmunologia
    • http://tetefope.lawnsystemsinc.com/uploads/1/3/0/7/130740596/6735186.pdf
    • http://kuzebikim.piratewalks.org/uploads/1/3/0/9/130969472/9626484.pdf
    • http://files.missrodeokansas.org/uploads/1/3/1/4/131482832/3251671.pdf
    • http://files.therealhealthymum.com/uploads/1/3/1/1/131164236/vogibix_jibunajotaw_vedaselalizak.pdf
    • http://files.pghfestival.com/uploads/1/3/1/4/131437873/8168401.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/9571999843.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/48103224087.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7688/files/movimiento_rectilineo_uniforme_ejemplos_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/69512116634.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5243/files/threats_to_validity_and_reliability.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/45566248050.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3755/files/15477466215.pdf
    • https://cdn.shopify.com/s/files/1/0432/4576/4770/files/consonant_and_vowel_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/call_me_a_speceman.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_off00008aeb.bin
1aa91d2a2b2abf6dd1a584a5876fbe7232230cc1d2a90179842ce43698efbe1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEB 5348 bytes
font_01_sfnt_off00009d08.bin
20724b2f7de0db39cf9462c2ad15d6f0e3c2e13409ce73d1cf7c79f119ebaf04
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D08 10404 bytes