Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d685523b4addd7…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 02:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f49456b6dfcf3cf9d01136c59bb8be86 SHA-1: 74e5f0874d2b26519d17e5fc2439292e084c6d3a SHA-256: b2d685523b4addd7df2924be2e504ad3be147c805c394262ca1cfe96dd1fc1d3
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 'ttraff.cc'. This URL is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, also contains this URL and other links, suggesting a lure to external content. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links.

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/wb?keyword=roland%20juno%20ds%2061%20manual
    • http://files.teddynasrmusic.com/uploads/1/3/2/7/132740270/fenalaxadijubaniki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/dragon_age_arcane_warrior.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/77731995067.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/pabazefenemobovozuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/ledufud.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/51944344426.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/matazuxomojawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/fovitifiwopapajufabawamis.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/dulofazumukiker.pdf
    • https://cdn.shopify.com/s/files/1/0446/9476/5724/files/97139637048.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_off00005bbf.bin
658c92e3892cdf0c2440ad9f9e2d0569c52a017ca5b0bbb97e918397b15b282e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBF 5164 bytes
font_01_sfnt_off00006d41.bin
19fcae9d9b01f476de8d61dec08c32a26fcf58da347a95850ff87d410d8c3fa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D41 2324 bytes
font_02_sfnt_off00007746.bin
4870734d349ce304ea57dcf90ea29ea4a1349e79b86f7e62dc21b1325e7e4578
pdf-font-stream PDF embedded font (sfnt) at offset 0x7746 10088 bytes