Malicious PDF — malware analysis report

Static analysis result for SHA-256 166b2e94e8efe28f…

MALICIOUS

PDF

57.4 KB Created: 2020-08-11 15:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 139c330ff55cfc1bfa1762bf902bc4ad SHA-1: 657e7657ca22e8420632d9005566047d792aae31 SHA-256: 166b2e94e8efe28f7005a0389748c54a83670660e500c9ec446b4563908250a3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. The primary malicious intent appears to be redirecting users through the 'ttraff.com' domain, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure itself facilitates the malicious redirection.

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=breviarium+romanum+1961+pdf
    • http://files.fsugarnetandgoldkey.com/uploads/1/3/1/4/131453076/rolijo.pdf
    • http://files.eternalcycleworks.com/uploads/1/3/1/6/131636719/nebiv.pdf
    • http://sisiteza.woodprojectsbybagel.com/uploads/1/3/2/8/132816202/3915392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/10952893492.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/33370139224.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woziki.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/gixuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/84912816692.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/zeferenulivegowofupuker.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/medobalifonomevofolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0528/files/marketing_communication_manager_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/burp_suite_cookbook_sunny_wear.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_off0000a3b7.bin
cdfea066ef1aee38a12fcca3b7624e9a82db619970ac7b1434daaa1427d77c0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B7 5448 bytes
font_01_sfnt_off0000b62f.bin
858520dd24c67b13e9b286b43b8106b9f6c78d454cce63c708f496a5590d5b67
pdf-font-stream PDF embedded font (sfnt) at offset 0xB62F 10156 bytes