Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb10f32d6559e9a…

MALICIOUS

PDF

39.9 KB Created: 2020-08-25 20:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fb4fe581a86f22fc44099afc2e149f2 SHA-1: 1371633394243e6f57276f2bbacee17806a10f40 SHA-256: 0cb10f32d6559e9a5030a75fc49ec56cd45469af31d98c10f3f2f827c23248df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), which is likely the primary malicious payload delivery mechanism. The document body itself is largely obfuscated but contains the same redirector URL, reinforcing its malicious intent.

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.cc/pify?keyword=herbergers+logan+utah
    • http://files.voyageoftherascal.com/uploads/1/3/1/1/131164130/51ec5dcab89e.pdf
    • http://files.albanyorganics.com/uploads/1/3/1/8/131856122/5780981.pdf
    • http://files.moodyteaandthings.com/uploads/1/3/2/7/132740480/6293670.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/rutipojavanusageguxenone.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/xurifigexepezepoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/xibixibezibajomove.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/rowilinuwefawixejupetu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/zidovitapokijiforemoduw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/fofizabajibobejuropudi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/guvikoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/caltrans_bid_bond_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/vukokajabowojibilegevix.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/tuzumagudekob.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/meragogukamogobexagexile.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_off000059ac.bin
d99b54ed6ab1caaa689ce8664cbd9ef13685baf7d26e9fedad3c22eaf7fb0385
pdf-font-stream PDF embedded font (sfnt) at offset 0x59AC 5048 bytes
font_01_sfnt_off00006ac9.bin
819459ac28b7991ff8555fabb4a9afb8b63ffe30a1e70354c2f22f5708e384ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 12408 bytes