Malicious PDF — malware analysis report

Static analysis result for SHA-256 06870e76965d4bab…

MALICIOUS

PDF

48.8 KB Created: 2020-08-24 15:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4643b79f1c38c5542620b7ac4ccc868 SHA-1: c98f17bd72890b880235b0fe81fcdcb929300604 SHA-256: 06870e76965d4baba194f4d1ad853e9ec1cd5e36d89fbbaff705b71e29be3ae9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, including one to a known malicious redirector at `https://ttraff.ru/pify?keyword=board+of+directors+minutes+pdf`. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent. No scripts were extracted, but the presence of numerous links and the malicious redirector indicate a phishing or redirection attack.

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=board+of+directors+minutes+pdf
    • http://files.rocconsultindesign.com/uploads/1/3/2/6/132681308/boxodopalabuvigivuto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/52755277903.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/13372042173.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/fefixademobaw.pdf
    • https://cdn.shopify.com/s/files/1/0463/3542/6721/files/31282846903.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/english_language_proficiency_and_academic_performance.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/rusos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/gijebuvapufaxove.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/rihanna_birthday_cake.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/fufidezalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/41891539635.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_off000082a4.bin
6b6cecc614e0ee74d3e43273f4f3c14037d862baa39ad203522bc04b995aa0bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A4 5320 bytes
font_01_sfnt_off0000949d.bin
b439be783b2e3c36e38028c197f6fc3aed267871e6ab56278a93b50a75a8372c
pdf-font-stream PDF embedded font (sfnt) at offset 0x949D 9912 bytes