Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15246e8b2d8743d…

MALICIOUS

PDF

48.9 KB Created: 2020-08-06 08:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1a8f7dcd30cb6445a6e42c40c8ec8be SHA-1: 5138f73df02008e6949f177e8f4f9eed67080c0b SHA-256: a15246e8b2d8743daa030defec4b7dfc9627cc75167be08a7223f4992c0b96a4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with the primary link pointing to a redirector service (ttraff.cc). This suggests a phishing or redirection attack designed to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=business+view+of+information+technology+applications+pdf
    • http://files.alphabetak9.com/uploads/1/3/2/6/132681508/5958045.pdf
    • http://files.klausriis.com/uploads/1/3/0/7/130739239/a688654.pdf
    • http://pajam.smartstartdriving.ca/uploads/1/3/1/3/131380429/torelawuwumafapaxab.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/sapedojuxiromarematigewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/13996008813.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/kenor.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/jalusoxusekageta.pdf
    • https://cdn.shopify.com/s/files/1/0434/0793/3603/files/conduction_of_heat_in_solids_oxford_science_publications.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/wunekom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/purudefatimeledipuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/wegusixim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/89541690479.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/56723314087.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_off00007d7d.bin
543d692b384ce3b15e264905413f62a071c2e2ce6f12964e59e1bc3a2f705368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7D 5872 bytes
font_01_sfnt_off00009172.bin
b811b8337673740da3d01d3d502eafd4270bd07fdf0a45d6f1627bafc5ed772f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 10904 bytes

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