Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad5b6538d90d335…

MALICIOUS

PDF

39.6 KB Created: 2020-08-07 15:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36627a97254e3db02b20ced83e9d381a SHA-1: fce3a37b0fcae90f371583349f58dd390199a3c5 SHA-256: 2ad5b6538d90d33577b772a508e58d76a73af7ce440aee20886b325cbbee0ae4
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be redirecting the user to the malicious 'ttraff.com' URL for further exploitation.

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.com/pify?keyword=alchemist+food+menu+pdf
    • http://files.uroco.co.uk/uploads/1/3/1/8/131871433/pawepunepenilujexaru.pdf
    • http://files.ritzwinterhop.com/uploads/1/3/2/3/132302764/3966259.pdf
    • http://rixonemu.poweroftheflowers.com/uploads/1/3/2/7/132741334/xumolunakinumiferudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/2004_ford_freestar_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/74499448646.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/adaptive_control_kj_astrom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/dms._vizio_link.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/pilowiduzujedofuxazude.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/donigonokuzovugogop.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/8032513245.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7551/files/gimibedanavivamanekigor.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/62823448051.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/gojepofelovepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0642/7299/files/5887821695.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0431/4998/3901/files/wenod.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_off00005c14.bin
51235e88cbc914e8f07eeb106718a0f15aef0d8982eb36c3969f91722dc07961
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C14 5080 bytes
font_01_sfnt_off00006d3e.bin
510b87d0edc144a85bd59976fd47e8c25b166d59352fa75065461d893dee87f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 10692 bytes