Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9cb31b2f3aba20…

MALICIOUS

PDF

34.4 KB Created: 2020-08-11 06:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eb21e13878483201eb946817e939d71 SHA-1: 3b6444b51d32ff2d30a631d6eaade7ab30118178 SHA-256: 4d9cb31b2f3aba2061ba56ce8958e872a8021cac20ff9724bfeb84b964718508
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to obscure the true destination. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/pify?keyword=catalogo+mary+kay+maio+2020+pdf, which is likely used to redirect users to a malicious site.

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.cc/pify?keyword=catalogo+mary+kay+maio+2020+pdf
    • http://riwut.mrssiegelsecondgrade.com/uploads/1/3/1/8/131856158/6942278.pdf
    • http://lakekaza.scpassportandvisa.com/uploads/1/3/1/4/131453133/d61d4c5eec.pdf
    • http://files.profjbh.com/uploads/1/3/2/3/132303337/voretonitu.pdf
    • http://files.coffershousingsolutions.com/uploads/1/3/2/6/132695213/bazajab-dateruripol-jesewagij.pdf
    • http://files.thejharrisdesigns.com/uploads/1/3/2/3/132302819/kikikapiduzizatido.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/definition_of_qualitative_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/61053419621.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/nuzuworodafugadiwafuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/movimiento_muralista_mexicano.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/29978199648.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/notil.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/61059766912.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/functional_requirements_of_walls.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/34388053900.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/10365969254.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_off000048da.bin
5ddc06a9d12d60a7ee3b1d7d62a0c5b3e0809fdd5920ce64efcc925294dcaf9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x48DA 5528 bytes
font_01_sfnt_off00005ba1.bin
b4449b52cb93b562784daee58583b9d687b43b415d554cd033797742ad4ffd56
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 9632 bytes