Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc7c9e58050f1ad…

MALICIOUS

PDF

51.7 KB Created: 2020-08-02 19:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26e95659f16892c6af5e01cb98b534a7 SHA-1: 58d326272a2aaf138ba42a118129612e4ba5d73c SHA-256: 3fc7c9e58050f1ad16a2570b69d4dcd45df208911585e027dffece21b20b1789
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the title 'How to get fortune enchantment' and the same malicious URL, suggesting a lure to a scam or phishing site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to hide the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=how+to+get+fortune+enchantment
    • http://files.notaproblemgame.com/uploads/1/3/2/6/132681033/tekoxuder.pdf
    • http://files.calaguasislandtour.com/uploads/1/3/1/4/131453674/xikivunosomixaginaz.pdf
    • http://files.jenkinsreidfamily.com/uploads/1/3/1/3/131379759/dukelebo.pdf
    • http://files.lakewashingtonsaddleclub.org/uploads/1/3/1/3/131381614/ef84bfae6b1ee.pdf
    • http://files.themcaa.net/uploads/1/3/1/3/131384113/9746727.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/mogemupaxinige.pdf
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/77760321270.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/suxumatolosebesowedilax.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/2020_buick_lacrosse_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3653/2136/files/27395485963.pdf
    • https://cdn.shopify.com/s/files/1/0433/2738/9851/files/35407884827.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/luzobutoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/36193808012.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/far_cry_3_trainer.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/71847699428.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_off00008cda.bin
994f60546cfc3d2c2aabc8b2e494fac096269cbca729f4ed4df9ff657a25c3d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 5140 bytes
font_01_sfnt_off00009e49.bin
0ef0b98d9047f86d5c6a82fbfad191d60aadf936e9439948453af783ad298e79
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E49 10632 bytes