Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f429f6da8cb401b…

MALICIOUS

PDF

67.0 KB Created: 2020-08-03 02:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fad7efb6f20a9a081ba6c19b60123ee4 SHA-1: 31cdf0bdddc48c02ea89bc43d77928b3b1a31b0a SHA-256: 7f429f6da8cb401bef6c2b39e96ba4c6651cdce0e002fa24ec5203003a9025ea
152 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, many hosted on Shopify, likely as part of an SEO link farm. One critical heuristic indicates a direct link to a known malicious redirector, ttraff.com, which is further confirmed by the embedded URL in the document body. This suggests the primary intent is to redirect the user to a malicious site, potentially for phishing or malware delivery.

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/wb?keyword=promises%20of%20god%20bible%20study%20pdf
    • http://files.wstaylor.info/uploads/1/3/1/4/131438474/d64889b.pdf
    • http://files.cederosier.com/uploads/1/3/1/3/131383319/sibowufe.pdf
    • http://files.bradfordhincher.com/uploads/1/3/1/3/131381614/zajawefewalena-xufaxozolisul.pdf
    • http://files.gateslscott.com/uploads/1/3/1/0/131071184/6881945.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/38126631197.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/kowadifegasor.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/2493703944.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/guxusabim.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/xudaxolijixos.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8019/files/bobcat_753_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/fewodineramopufexisubolob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4843/files/freeman_biological_science_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/tawagusegevedumirazaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/chinese_kenpo_techniques.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_off0000c9bb.bin
e39214ecb5ce96d9e31185b6fd1239cb9975625bbb70d094b59d63b4e2990250
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BB 5396 bytes
font_01_sfnt_off0000dc02.bin
85a4d052f0ee42c5d4819fad0069dbcabfb967b373d23e2b665c2f182329da64
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 10284 bytes