Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc864ffc68f8341…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 09:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35a83d9de88f709afd9c3ab032fc0657 SHA-1: 978ec00afdee05b0a8db93ecf4fc211d0d105f8d SHA-256: 0dc864ffc68f83416a8e9b4d7c3c832f6c7377c8958ade7569dcb3d6f213a6a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify. The document body also contains this URL along with numerous other links hosted on shopify.com and a suspicious domain, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection attempt.

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=tivoli+directory+server+administration+guide
    • http://fafip.artentwined.com/uploads/1/3/0/8/130874655/7cbb628596925.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/81840537973.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/21146281727.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/sekifiwesasigufonun.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/92980266859.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/amber_white_noise.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/barron_s_sat_math_2_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/jejutinisiputi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/33082952565.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9942/files/14283092004.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/17033027948.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2914/files/ethiopian_new_comedy_film.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/febujubeje.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a71.bin
896f738f07b7f96c86c69502f7f48c37ed84d0845147ae6070d30c26cfa28097
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 5372 bytes
font_01_sfnt_off00006ca7.bin
0e9285bc4b1bd77d3eaec29a89c1430d648596457af4f8afb07dbf0d4f35f403
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA7 13256 bytes