Malicious PDF — malware analysis report

Static analysis result for SHA-256 faac109043035d54…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 02:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a2c1f0e157e3855952b2d062258d319 SHA-1: 08427980b2bba7d54d4cfff8228b9d35e13e6422 SHA-256: faac109043035d542f857dfa8263003a8deda8d8972088ab0a47632c70004c52
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=nocturnal+animals+movie++in+dual+audio`. This URL is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains similar text, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing further 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.ru/pify?keyword=nocturnal+animals+movie++in+dual+audio
    • http://fixazo.crispusattucksalumnilettermen.com/uploads/1/3/0/8/130813528/lixedogaxisepi-xuvajorapi-rovof-fedibajutidipax.pdf
    • http://files.jamaicapackages.ca/uploads/1/3/1/0/131070841/wobopebejar.pdf
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/ways_of_the_world_history_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/jexodirudowudiwoberiwibez.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/91636786153.pdf
    • https://cdn.shopify.com/s/files/1/0451/3919/8105/files/85460449808.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/72409580356.pdf
    • https://cdn.shopify.com/s/files/1/0433/7703/3372/files/gemabigane.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/26997942656.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/wamexofewupegowokol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/strength_of_materials_syllabus_for_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/repokowalelipawax.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/rexapexikesused.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b4c.bin
5bc118e2c03e8850281bcee27ded0b9154f58d65e6ac0e5e4ea0957fb843da9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4C 4996 bytes
font_01_sfnt_off00005c31.bin
98cc3ef7a6d87dce15c7e5aea8efb20ddecf58ff69d83110059602336f2ba825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C31 14000 bytes
font_02_sfnt_off000087a6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A6 4324 bytes

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