Malicious PDF — malware analysis report

Static analysis result for SHA-256 8179f53e5b271181…

MALICIOUS

PDF

82.5 KB Created: 2020-08-05 07:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba111de621b25d17f410af59aaa9af8 SHA-1: 68ff96e9c314a274d90740394bc83857d1875dee SHA-256: 8179f53e5b27118166e17401c5e463a7d572e3b836b9f43f4050f2af6f20dc4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=anxious+attachment+style+pdf, reinforcing the redirector finding.

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=anxious+attachment+style+pdf
    • http://files.madmulefitness.com/uploads/1/3/1/4/131436981/d965a75efe.pdf
    • http://files.nurturedbirthservices.com/uploads/1/3/0/9/130969545/8e3366b0d399.pdf
    • http://jovosev.elainealec.com/uploads/1/3/2/7/132741555/149175.pdf
    • http://files.ultimatepalestine.com/uploads/1/3/1/4/131414240/2723728.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/20104626308.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/44319052936.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/gapezijavivofezogajeluxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/79178734754.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/rifurix.pdf
    • https://cdn.shopify.com/s/files/1/0431/0600/9255/files/nituwotonekapileg.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5424/files/24096963389.pdf
    • https://cdn.shopify.com/s/files/1/0430/5849/5639/files/zaliku.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/universal_studios_orlando_mapa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3651/4216/files/10554966105.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0213/files/xeganunuvifelazugisemos.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/82652576455.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7975/files/54767058269.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/sikimafopesepovodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6948/files/polyarteritis_nodosa_adalah.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_off00010695.bin
d42d186c569a449b9b7812a7d94a8eeb5b1c493037cf0281247454e94903daea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 5456 bytes
font_01_sfnt_off00011919.bin
11a7b81fb575b40fef2e69cb0126784f503af4c474cdcfd4b217b6f41852278c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11919 10456 bytes

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