Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3aa1fbab0d77d3…

MALICIOUS

PDF

42.5 KB Created: 2020-07-10 13:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8415e5fa7cef548d1a9f958c00da3952 SHA-1: 64c5c2cea78d61b977de6539af5fb86a11073f27 SHA-256: ff3aa1fbab0d77d395440df529c9f7b27b637760475a79289c1d25ed43292238
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to manipulate search engine results. The primary malicious link identified is https://ttraff.ru/wb?keyword=coronary%20arteries%20anatomy%20pdf, which is flagged as a malicious redirector. The document body itself contains garbled text and some of the extracted URLs, reinforcing the malicious intent.

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/wb?keyword=coronary%20arteries%20anatomy%20pdf
    • http://files.wiltonneighbourhoodplan.info/uploads/1/3/1/6/131636995/zilelatisad_rojirogixi_xirude.pdf
    • http://files.nomadicsteve.com/uploads/1/3/1/4/131437538/42cb4690f8.pdf
    • http://files.salomearchitect.com/uploads/1/3/1/8/131857655/dagavokafum-barutetirux.pdf
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdf
    • http://files.whalawoffice.com/uploads/1/3/0/8/130874432/nedubatija.pdf
    • http://files.ornamentsofexpression.com/uploads/1/3/1/4/131455883/vojosa.pdf
    • http://files.misfitcrusaders.com/uploads/1/3/0/8/130814672/634f8e.pdf
    • https://janavitim807994190.files.wordpress.com/2020/06/99866607762.pdf
    • https://suzinupil.files.wordpress.com/2020/07/57311497527.pdf
    • https://vugerudima.files.wordpress.com/2020/06/gawobogaril.pdf
    • https://tobedubokigu.files.wordpress.com/2020/06/47288209763.pdf
    • https://nojurofezep809160310.files.wordpress.com/2020/07/55217772219.pdf
    • https://rekogexal.files.wordpress.com/2020/07/69015237482.pdf
    • https://saxerigokej.files.wordpress.com/2020/07/85260202350.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/5444270165.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.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_off0000688d.bin
e4fdce266f59c394f9f0c83636f926fa04415aa409da0b04feafcda9dc8da6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x688D 5068 bytes
font_01_sfnt_off000079b5.bin
28d601f5c6c147688c726935af5b3d1b7cbd43b7a06f39aa7cd37b7da85bdc87
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 10384 bytes