Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22702c95816cd2f…

MALICIOUS

PDF

39.1 KB Created: 2020-08-22 08:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23713180e88a448de994a076662ba137 SHA-1: a63d8c8a833fe901fcefde507131b4d9c911b7d0 SHA-256: b22702c95816cd2f58e578066bbffe3137601c7225f2b9d099ce4478ca2b7034
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be a malicious redirector disguised as a document link.

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=algebra+signs+rules+chart+pdf
    • http://files.bendbeeryoga.com/uploads/1/3/2/7/132740424/6037763.pdf
    • http://puxaz.regenerateyourauthenticnature.com/uploads/1/3/0/8/130814397/88da22143.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/sabineruvawisipononajafek.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/97112706098.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/most_cuda_cores.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/65474276244.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/oracle_12c_administration_workshop_student_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0780/9448/files/zelda_breath_of_the_wild_walkthrough_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6508/8917/files/1980177577.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/fafinamubusotupi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4696/files/which_port_does_telnet_use.pdf
    • https://cdn.shopify.com/s/files/1/0454/7484/0742/files/16-_8_intermittent_fasting_guide.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_off00005342.bin
f81917690c7ae9c81ffe5a4a88b419086bb98c9f60871af278f2da32a3c9b73f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5342 5544 bytes
font_01_sfnt_off0000660a.bin
58373494e55dfe949b1bf00ad4646f5cca516e71b4bab2c03f6eac905a03fdfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x660A 13240 bytes