Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cde9b9028c63aa…

MALICIOUS

PDF

142.8 KB Created: 2020-08-24 22:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30471bb7ef1dfa3f48a5995421bb74eb SHA-1: 17553feef5366f6e53927b8b94a84f9e723701bb SHA-256: 33cde9b9028c63aa4c955f3b9a53f14097550c61e42a752bd294773513f5916a
152 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=malarial+parasite+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, confirming its malicious intent to lure users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=malarial+parasite+pdf
    • http://files.theunintendedadventurer.com/uploads/1/3/2/3/132303170/bemolovan_gibuvinamavefov_xoxuwosoboma.pdf
    • http://getosa.wekeepyoumotivated.com/uploads/1/3/0/7/130739287/6037708.pdf
    • http://files.moniquenicolecaston.com/uploads/1/3/1/0/131069915/sawazax_xenasugudag_jilejivo_loler.pdf
    • http://files.lauracarolyn.com/uploads/1/3/1/3/131381782/lukurefob_bukipezafego_guvulavozedob.pdf
    • http://files.wrestlingjerusalem.com/uploads/1/3/1/6/131637136/zibotaxogi-wedewor-tukatibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/71288678362.pdf
    • https://cdn.shopify.com/s/files/1/0447/8841/6663/files/canon_eos_rebel_t3_camera_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/los_chakras_de_la_tierra.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/wugazodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/kununosunajevejenidop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/8765318986.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/62313003880.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/algorand_white_paper.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/adobe_illustrator_cs5_tutorials.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_off0001f1db.bin
46c5c5b99ed2961285509a5c0c2969a9a9a9982019ac940280b796f93db72d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1DB 5040 bytes
font_01_sfnt_off00020311.bin
4200ded66fb9be99f4ddb5e18d23b9a42fbaa9468bd08ea80cae6687e353331b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20311 13196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.