Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d68f9338229067…

MALICIOUS

PDF

33.6 KB Created: 2020-08-05 06:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6785be63ffd87a9a88d9b739b7d62eff SHA-1: 1041b594b7ed2c8f49568a8a773bc470e0630e6c SHA-256: 04d68f93382290677df866adeaf3ac7e766ec7a8c63d72308c9e6f3b26884a75
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a product catalog. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for further exploitation or phishing.

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=katalog+ball+bearing+skf+pdf
    • http://files.sarahjanegriffiths.com/uploads/1/3/2/3/132302718/1455847.pdf
    • http://files.ejwillisblog.com/uploads/1/3/0/9/130969185/demeluw_nobokejigibitun.pdf
    • http://files.missionbrain.org/uploads/1/3/1/6/131606134/8714326.pdf
    • http://files.vickiseabrook.com/uploads/1/3/1/8/131871698/74d94e2.pdf
    • http://files.artworkcroasdaile.com/uploads/1/3/1/4/131410736/9438399.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53741046047.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/95596815966.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/tetododolitoduwekopiju.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/lukomoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/winubazizov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3540/files/meguxonib.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/29157173611.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/lotaxapinafilujunitavebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/76596354864.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/download_phn_mm_chuyn_t_sang_file_nh.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/bajowozidowab.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_off000042d3.bin
f4f5efb8e08e79359d56a301de3d145a6c178c03b854ff242f6bc0e17e5f3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x42D3 5384 bytes
font_01_sfnt_off0000552b.bin
c2b1eb6dfa3f410ca8ee6e48f3a79ac8112087dce53ef9bccde4b08eadef333d
pdf-font-stream PDF embedded font (sfnt) at offset 0x552B 11404 bytes