Malicious PDF — malware analysis report

Static analysis result for SHA-256 299be74029969444…

MALICIOUS

PDF

43.5 KB Created: 2020-09-02 03:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3fe9d6206acb1d19df48284f7d11c69 SHA-1: 4875102f7fc791bc00ea326cab0f6f9ea2284c04 SHA-256: 299be74029969444039d9b5e28fa216b9f0cdbabe0de678300b908cc4b4cf808
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large PDF link farm. The ML classifier also strongly indicated maliciousness. The document body contains the URL https://ttraff.ru/pify?keyword=alpha+waves+audio, which is likely the primary malicious destination, while the numerous other embedded links contribute to the SEO spam nature of the document.

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=alpha+waves+audio
    • https://cdn.shopify.com/s/files/1/0462/7870/5312/files/animated_powerpoint_templates_free_education.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/64637231368.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/92954186249.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/mibaxegikagomedoravivoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/2140/8168/files/87318243861.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7152/files/baadshaho_movie_hd_720p_filmywap.pdf
    • https://static.usrfiles.com/ugd/e745be_010463015feb4c59aa4c97d5ca7b1d7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c6e22575b8420095f916db2e0d5244.pdf
    • https://static.usrfiles.com/ugd/ac51ce_5d6aa6817b3b4e68bf1aa51622f53436.pdf
    • https://static.usrfiles.com/ugd/d79848_d5319eeb37ad4d3eac1664b5eb00c232.pdf
    • https://static.usrfiles.com/ugd/f99735_36c84a4ea44241748590c90a4456bc22.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_d12ab11668b449bc91330f65ef33443b.pdf
    • https://static.usrfiles.com/ugd/25c42e_ab9c89f4f4b445cb910ee43540aa00c7.pdf
    • https://static.usrfiles.com/ugd/41f880_2b52ea1658484ecf9c79926209e35423.pdf
    • https://static.usrfiles.com/ugd/f9d4cd_13d06172065945388920bdb25cda872c.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_off00006db9.bin
0542d8450a99c6113b643390fa2ed8087ad0d83f400538fdbbbedd5a44f055b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB9 5092 bytes
font_01_sfnt_off00007f1c.bin
95bd8fed92b845df69959af63176f23c11974ee7b771e2d5a71be515279e66f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1C 10168 bytes