Malicious PDF — malware analysis report

Static analysis result for SHA-256 93debf26e04945dc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-11 09:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab3cbd04775539685da0d66c9eecd01 SHA-1: 62f39f734363ceb2302e6166c4e213619824c28a SHA-256: 93debf26e04945dc278d2acee4c4e163728ba5d18ab7d78c9c3a9956ba5c68be
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate PDF downloads, but one of the primary links redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.ru/pify?keyword=bhagavad+gita+chapter+13+in+sanskrit+pdf as malicious. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous other links, many hosted on Shopify, suggests an attempt to obscure the malicious destination within a large number of seemingly benign links.

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.ru/pify?keyword=bhagavad+gita+chapter+13+in+sanskrit+pdf
    • http://files.wilmastransitionsociety.org/uploads/1/3/1/3/131381658/tezukoxib-zatakesin.pdf
    • http://files.lsherman.com/uploads/1/3/0/7/130739918/bovude_magibuliduf_wivubegal_vofetap.pdf
    • http://files.heissrealty.com/uploads/1/3/1/0/131069859/zozupuverimetu.pdf
    • http://files.sweetpeatakeaway.com/uploads/1/3/1/1/131164168/pedizuruwir.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8489/files/gikum.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/lp_cephalgia.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/19718464545.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/34984600736.pdf
    • https://cdn.shopify.com/s/files/1/0439/3399/1080/files/nuzotorexulesigex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/85032962344.pdf
    • https://cdn.shopify.com/s/files/1/0428/5025/5014/files/always_hungry_diet.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/how_to_write_a_good_readme.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/patezidubugafosuguleli.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/30635416517.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/beehive_class_9_english_book.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_off000069fd.bin
7c5e9f56c50379b0387afbc6edc62abc2ec30f9d470cae354e568b2f7fed49f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x69FD 5772 bytes
font_01_sfnt_off00007daf.bin
e95c13140c7e6b97fe534b0a4dfe408f2ccd9ad40956b393b2674c67672c19d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 9656 bytes