Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab4454a599b2913…

MALICIOUS

PDF

52.8 KB Created: 2020-08-30 12:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b311f023b6ef07aab4a491b8039648f SHA-1: 575f86a93b7deb9340a5b462a47635e46138f509 SHA-256: fab4454a599b2913305ac2bd5af9c2deb3cf70fe1c684af545356926a76cff87
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is `https://ttraff.ru/wix?keyword=the+black+magician+trilogy+pdf`, which is likely used to lure victims into malicious sites. The document body contains garbled text but includes the suspicious URL and several Shopify URLs, some of which are benign.

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.ru/wix?keyword=the+black+magician+trilogy+pdf
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/72621745172.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/badazasosujizemewaxaduse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3481/files/peminisixosadodesizomijow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/mirifom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/46476362454.pdf
    • https://cdn.shopify.com/s/files/1/0437/5350/4917/files/post_behavioralism_in_political_science.pdf
    • https://cdn.shopify.com/s/files/1/0436/1689/5133/files/38717830030.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/visezuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/darobiruzebavegax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/77788885252.pdf
    • https://static.usrfiles.com/ugd/b42fd6_370eec2cc8344582a2f56472947d4353.pdf
    • https://static.usrfiles.com/ugd/d5d855_4d084bb70bac478391fb8a51f999bb6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ec54658663d40dda07b4a9180666798.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe34ca5882194272a29bb2c5dab30fca.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1aa3331b76b4f1cab0b80ad2e97d24b.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_off000090e9.bin
d0032d577725386d84ac625588614f9b4b084fdf39e88bca58c8fe0160019711
pdf-font-stream PDF embedded font (sfnt) at offset 0x90E9 5644 bytes
font_01_sfnt_off0000a3fc.bin
5254992624c7b6ea882250cbf950f856738623231a4cd4adafc332026dbd4fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FC 9908 bytes