Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dec896c97ad74a…

MALICIOUS

PDF

33.3 KB Created: 2020-09-08 07:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be8ec0faf812b0ba8b0178ef96f79b4 SHA-1: 1d5124611847f9320de789abf8193204dfbec540 SHA-256: 10dec896c97ad74aaf42df838c909498d580d3ccd454773352b583a465eb3317
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One prominent URL, 'https://ttraff.me/wix?keyword=under+armour+team+uniforms', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure points towards an attempt to redirect users to malicious content, likely as part of a phishing or scam campaign.

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/wix?keyword=under+armour+team+uniforms
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dfb5f8_7f79c188b4d140d8b9072f851980e16a.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_5714b6210a5b43b38cfee782c98f1bd9.pdf
    • https://static.usrfiles.com/ugd/739437_af5949902696471f92ce4a1e40fbc05f.pdf
    • https://static.usrfiles.com/ugd/9cc572_036dfa074fb04869a2c7281175034715.pdf
    • https://static.usrfiles.com/ugd/45fd81_90917aa9a8b043d0a2f5aca5bdc13f92.pdf
    • https://static.usrfiles.com/ugd/4bb894_8e83996135684655bdb63ef70b82b43c.pdf
    • https://static.usrfiles.com/ugd/aef5b7_9da97e5f38c8457b9b7355cf70a7ac5c.pdf
    • https://static.usrfiles.com/ugd/aef5b7_fae2be94ddc34692a52e7e98a446a2b9.pdf
    • https://static.usrfiles.com/ugd/c618e9_30ac6035b0fe41c9b8a4e58cb317a3e2.pdf
    • https://cdn.shopify.com/s/files/1/0462/5262/1973/files/15694992853.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/wafija.pdf
    • https://static.usrfiles.com/ugd/eda9ba_f27c51a2df2e41f0ad91662e20953827.pdf
    • https://static.usrfiles.com/ugd/113e89_883df8a10d0d45e389398c0ca1d7e99b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c54bd2ae6154264994c4dc68574f727.pdf
    • https://static.usrfiles.com/ugd/48f461_0ed27f6689b640b6b6edcb0c5c41470b.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_off00004729.bin
8bbca103da5f9b7664fab116a358f81c9dfaae8bc21cb1dcdc2aa1561e1ed614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4729 5012 bytes
font_01_sfnt_off00005825.bin
a925dcd2bfe9f295f2d5bb492effcab3dd454af42a2aad2b99190c9f5a9a7e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5825 9624 bytes

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