Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34f2eba7432333e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-25 07:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a45572884cc3a6286542e2ef75e1496 SHA-1: 31af8be4eba16126951087ef6488345e0df32084 SHA-256: b34f2eba7432333e6a59725a72c263063632d7898745a615be576c1da56422a9
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, 'https://ttraff.cc/pify?keyword=watch+virgin+tv+anywhere+on+android', which is flagged as malicious. The document body also contains this URL and numerous other links hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated 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.cc/pify?keyword=watch+virgin+tv+anywhere+on+android
    • http://zimidag.kccsvg.org/uploads/1/3/2/7/132740541/buwunun.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/21977903352.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/bewuji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/sadas.pdf
    • https://cdn.shopify.com/s/files/1/0455/4273/6037/files/analysing_and_visualising_data_with_power_bi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/mifilaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6343/4654/files/57325007038.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7425/7057/files/85856933999.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/58655278731.pdf
    • https://cdn.shopify.com/s/files/1/0448/9166/8647/files/3201891300.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/angel_of_darkness_caleb_carr.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/44064431386.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/56557155977.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/44168148794.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/kixobimaxujasezepij.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_off0000651f.bin
a38c70f7b9579206e5346db811bc8c979689aac472e413fde8483d6b5100f13e
pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 5256 bytes
font_01_sfnt_off00007712.bin
15a32141fe6be6ba03d38920309eae969ce7db0d2f6dfe801c2eafaa1c87d26f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 14204 bytes