Malicious PDF — malware analysis report

Static analysis result for SHA-256 a473be6986aec970…

MALICIOUS

PDF

44.9 KB Created: 2020-08-13 18:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c045c8a825c2d90c587be54d34282530 SHA-1: 2f1ebb06e4ae7fd4141b2d59587f9305fa3a8ce8 SHA-256: a473be6986aec9708ca6c51251c65bc4a455db5d978426b8ec5f29f25bae2a0c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/wb?keyword=pdf%20annotation%20windows%20surface, which is likely used to lure victims into clicking on seemingly legitimate content. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=pdf%20annotation%20windows%20surface
    • http://files.rochesterarealiteracycouncil.org/uploads/1/3/0/8/130813991/e47602e.pdf
    • http://files.adventurerunningco.com/uploads/1/3/0/7/130740212/f88527119359.pdf
    • http://pibase.liveresco.com/uploads/1/3/1/8/131871991/913643.pdf
    • http://files.raveim.org/uploads/1/3/2/6/132682142/kaleko.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/69004823559.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/fotisavijasevezivulef.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2430/files/69365553307.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/desufez.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0721/files/13843753288.pdf
    • https://cdn.shopify.com/s/files/1/0435/6620/3029/files/rekuwusawululekorol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4494/5571/files/cours_administration_systeme_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/megabytes_to_bytes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/online_converter_to_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/favanemopup.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/kusubedepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7125/0333/files/nukudukokapirumezuped.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/metro_map_madrid_spain.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_off00006e4b.bin
ad097df6e4aa33687e6b7af9193e783136f9fe901b61e3a756e8e94210b28b2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 5076 bytes
font_01_sfnt_off00007fae.bin
eb3e92cc3370b00347b2ff2a812e43c0632814eaa8820005182bc88cf2d00811
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAE 11696 bytes