Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a82b336eed8964…

MALICIOUS

PDF

33.3 KB Created: 2020-08-09 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a798dbeb6bf126655abcc23b7d52450 SHA-1: 226b59819cb8384ff478ad09ed83077eca225a20 SHA-256: 96a82b336eed89649bca498dc67649fff8543ea2883a67077c56f1dc4d3eda4c
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a large number of embedded links, a technique commonly used for SEO poisoning and redirecting users to malicious sites. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=neither+nor+either+or+worksheet+pdf'. The document body contains garbled text and the wkhtmltopdf application name, suggesting it was programmatically generated to host these links.

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=neither+nor+either+or+worksheet+pdf
    • http://lunax.islandarks.org/uploads/1/3/1/4/131437987/c67af957b6433.pdf
    • http://files.myjpfitness.com/uploads/1/3/1/1/131164556/68cb7a2384.pdf
    • http://files.elpasoteachersassociation.org/uploads/1/3/2/6/132695551/dibuwof.pdf
    • http://veralur.aniasorganics.com/uploads/1/3/2/8/132814930/nujagiridebazuzoz.pdf
    • http://files.smarterbites.org/uploads/1/3/1/4/131453869/63b20a13.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8493/files/sikuwevosipumiruren.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/fimowixadupevoxozuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/44168376122.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/ruxizefasoludasakiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/andreas_vesalius_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/zejavazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/21583018511.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/zekak.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/peanuts_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/pepetupuwiludenozuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6582/7747/files/clannad_visual_novel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0558/files/lawanuneperorejuvive.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_off0000462b.bin
ec39afe2044159f7218c0900da7f4ec19b2645e439bef1a90a11f0bac8dd10ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x462B 5012 bytes
font_01_sfnt_off0000574b.bin
d35fedc6d4dc49a9613ca32a53daadef5f3cce44452d7e9b5b7cd25dcae65e57
pdf-font-stream PDF embedded font (sfnt) at offset 0x574B 9716 bytes