Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6d8fec47f3eac2…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 20:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: febfc63e07b65bf844e49cc0d536563b SHA-1: 570f60b8dc36e6457cb242a059ef58d6c197abf7 SHA-256: 0d6d8fec47f3eac230ed0e02c76aaafdc99254796aeea42fa717b6d9fb690010
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or content distribution network. A critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely used to obscure the final destination or distribute malware. The ML classifier also strongly indicated maliciousness.

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.me/pify?keyword=business+card+template+word+2+sided
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/29082287144.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/67133726507.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/53526340231.pdf
    • https://cdn.shopify.com/s/files/1/0449/7866/7688/files/vekatipemixir.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/xawidexilenukuwo.pdf
    • https://static.usrfiles.com/ugd/23e9be_6b876a93d09d40e9b11ef3a009c37a3a.pdf
    • https://static.usrfiles.com/ugd/aef5b7_922e16cd08554448af668c45b810d808.pdf
    • https://static.usrfiles.com/ugd/b8c837_27a585d233e94e27a2dc28e0bd69e478.pdf
    • https://static.usrfiles.com/ugd/934fc3_7fe9c2ccc79e4c2685868e2311c91b9e.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/35215684264.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/essentials_of_lifespan_development_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/27975059720.pdf
    • https://static.usrfiles.com/ugd/37321e_f15326219b2646958d609a845abc5904.pdf
    • https://static.usrfiles.com/ugd/4bb894_35510362e6f0411d8aa01272741461e1.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_off000061fe.bin
9550f44cdf7eb2662dc0dffeed1ef7f56e4cdc564c08b865faab05641f100f31
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 5492 bytes
font_01_sfnt_off000074a9.bin
4bd3ed4b9f5ac3a84ca3567901cad6e402a03f7c304bc47887c3c855f2a9908b
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A9 9992 bytes