Malicious PDF — malware analysis report

Static analysis result for SHA-256 7444e22ebbf174dc…

MALICIOUS

PDF

51.7 KB Created: 2020-08-22 13:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d32a83e0688decf13be439a21bc73e SHA-1: 6b6d6473244d1f64486f22532a563d5275c2c343 SHA-256: 7444e22ebbf174dc0d4ca617a2823edbf25a5208209f82f6660e513dd5732cd9
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a report that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=hogan+assessment+sample+report
    • http://gikaf.embracefoundationgallery.org/uploads/1/3/1/4/131453197/lukajujabel.pdf
    • http://padajoxot.stephaniepercydoula.com/uploads/1/3/1/8/131856374/vavuzisopelix_tizorifipijinuw.pdf
    • http://zolinana.biggs-group.com/uploads/1/3/1/4/131438477/sikepesipanuxop-ladokuxeso-xijabixinen-pekigadawufi.pdf
    • http://tivewi.townofhafford.ca/uploads/1/3/1/3/131383648/paxisivewera.pdf
    • http://files.hollywood-resumes.com/uploads/1/3/1/4/131453818/2afa15d7e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4295/4651/files/77212753012.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/how_to_use_terminal_on_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/4890075096.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/46975582918.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/44933811559.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/54840057873.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/77720331719.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/44824293994.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/sazujabivi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/55847999709.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_off00008ca1.bin
c1952ad2ffdfe56c5d11197ab0cb69dd3b686d758b8927362e1ec38478ce5e7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA1 5100 bytes
font_01_sfnt_off00009de1.bin
f7c8b193e50973065e038f992c932feaedc446ab380b0dc667141190f89342e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE1 10716 bytes