Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa50a049648a221…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 20:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca956c27d9ce188f81dc57869212703 SHA-1: f47035420166deb9d675755f3d96e8a839b9a66b SHA-256: 7fa50a049648a2213ab0ac4f1de01a4870a8b076a5caf215efed11a471ce0f9a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also listed as an IOC. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious content.

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/wix?keyword=charlotte+hawkes+miss+england
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8221/0725/files/89934716954.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/90152002938.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/39096396135.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/it_isn_t_easy_being_green.pdf
    • https://cdn.shopify.com/s/files/1/0439/0351/6824/files/jejelogaxaluwizesunekakoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/16778145369.pdf
    • https://cdn.shopify.com/s/files/1/0462/7087/3762/files/examen_toefl_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7739/files/actinomycosis_in_cattle.pdf
    • https://static.usrfiles.com/ugd/e3ff21_40dc983d794346fc98f1abe40c88d23e.pdf
    • https://static.usrfiles.com/ugd/8a419d_6221b2b95d2344b2a7eb350093cdf0e2.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_off00006740.bin
5fc8b074a7e6c51b7e430d5116381b101fb4c986d904649420400db8685c5b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6740 5300 bytes
font_01_sfnt_off0000792c.bin
ac5d68d3cbc5bd8af46797f172394ea4bf8d4d4a546c9fb7e176062d547042eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 14884 bytes

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