Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7679c035a9b61e…

MALICIOUS

PDF

61.7 KB Created: 2020-08-05 08:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0354f0c40ef5eeb0dccc7f195649078b SHA-1: 927a1f47996267fc6ee6c27b8de4430d8862245a SHA-256: ea7679c035a9b61e249701d3f6cef3bf6c96639c405519a9f5891ef872908fc9
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=acceptance+and+commitment+therapy+overview+pdf, which is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure itself is indicative of a malicious delivery mechanism.

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=acceptance+and+commitment+therapy+overview+pdf
    • http://files.sacredspacesyoga.com/uploads/1/3/0/8/130814127/e5c9022b.pdf
    • http://bimel.cableporter.com/uploads/1/3/2/6/132680813/fonorupaju-bawolesarofuwov-berurajefal-megibubifelak.pdf
    • http://files.tstrattonart.com/uploads/1/3/1/1/131164473/8205910.pdf
    • http://didupax.geophysical.eu/uploads/1/3/1/3/131381204/78a708b81c.pdf
    • http://files.synergybc.com/uploads/1/3/2/6/132696263/6729554.pdf
    • https://cdn.shopify.com/s/files/1/0436/3599/8880/files/pdf_to_dwg_converter_online_unlimited.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/39281498177.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/wejulixefuwekakeli.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/zuvatawifemusegizi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/93793130355.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/xukogoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/41681790471.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/bomaxosikapavexelim.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/gufajowemoxagurorepedewev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/durew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6ce.bin
71c9b483a7f4117b190e0bb047aa7f9ddbc2f2b2ee992c5ca2fc1241a5991cd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CE 5216 bytes
font_01_sfnt_off0000b867.bin
c567dafc0fe61125aefbd85634c3e980fbd13cef2dd5173ebf227bfb8f5156a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB867 10176 bytes
font_02_sfnt_off0000db3e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 4324 bytes