Malicious PDF — malware analysis report

Static analysis result for SHA-256 448acd2d305c800e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-11 23:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a67158db6cc1f5647a8d44bc2ea4c98 SHA-1: b876df70463575e70fd428dbcb34eec6c54a318f SHA-256: 448acd2d305c800e8edb1f52a16b618c3c3799fcaa8a6a668f13ce9f2009b38a
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the target URL and related keywords, suggesting a lure to download further malicious content. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to harmful sites.

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=advanced+bestiary+pathfinder+pdf
    • http://vopot.vintagefisherpricetoysbyauroramorningstar.com/uploads/1/3/1/8/131871721/7754170.pdf
    • http://files.andthatmeanscomfort.com/uploads/1/3/0/7/130776661/pukavor-lusevonor-fadabopelatew.pdf
    • http://files.2eviecreative.org/uploads/1/3/2/7/132712006/nixevev.pdf
    • http://files.nurturingyourmystic.com/uploads/1/3/2/6/132681916/962259.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/71556078470.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0431/files/85193223350.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/risetifijoxinoravu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/58544519167.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/45395102240.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/15036216634.pdf
    • https://cdn.shopify.com/s/files/1/0432/0205/2257/files/jotigupedezanat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/57942778550.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/tatigenuxivekabovako.pdf
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/28119555046.pdf
    • https://cdn.shopify.com/s/files/1/0430/2327/0042/files/96475927373.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/48337392933.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_off00005b8b.bin
42b1260dc7fceac73c37d3b3dad5b900b05f3928a5f9ad46a9dc8e1bb56e7c06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8B 5500 bytes
font_01_sfnt_off00006e3a.bin
43fc54fade311b1e83b63c5c99fb8cea953977bcc08317e02582bd414e1d8645
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3A 10112 bytes