Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8b80a1cf290fc1…

MALICIOUS

PDF

53.3 KB Created: 2020-08-02 03:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed6289262f7fea2212bac422ee86acd3 SHA-1: c760f2842b82f6e5a471fba936c0e20ba3319e6f SHA-256: ab8b80a1cf290fc19f93e5d093d41933f84b2b403936b249190c3652130a2adb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.ru, which is a known malicious infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign Shopify URLs but are likely part of a broader SEO poisoning or link farm strategy. The document body, though heavily obfuscated, contains the malicious URL. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security. The primary malicious IOC is the redirector URL, which is likely used to serve a second-stage payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=apache2+disable+site
    • http://files.amwellvalleyhounds.com/uploads/1/3/1/4/131406344/8120592.pdf
    • http://files.wagner-heavymetal.com/uploads/1/3/1/8/131871745/sowijisezanizebo.pdf
    • http://files.nzrallycars.co.nz/uploads/1/3/1/4/131452806/nodimenamobovifej.pdf
    • http://files.nnft.ca/uploads/1/3/0/8/130813821/resuj_zofopudotapa_tiwofad.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/drake_to_much_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/31287503545.pdf
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/xetinonurawikuwifelupiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/25308616887.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/73261870964.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/60185574530.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/tinuxufavuwinajubami.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/87426174393.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/35281932931.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/bowflex_xlt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/57851887967.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_off00008420.bin
e445c5c458149a1368e860c7677fce851b6418adbc55d5b8ec4fe8d832c7e953
pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 5324 bytes
font_01_sfnt_off00009636.bin
ff2bc71cb7854f14a30e033b3e670d4b1835c125f83eb4bfd6e828fe5fc48fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9636 15712 bytes