Malicious PDF — malware analysis report

Static analysis result for SHA-256 b015efd993aacf43…

MALICIOUS

PDF

43.8 KB Created: 2020-08-03 23:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b78217946434736ff09c7e2b4f4ffa SHA-1: 329c9664e0f2a111b465a42e19b982682e82ec38 SHA-256: b015efd993aacf437db3775561eb01c07de52af975c8b83907d65cb13dd5f9df
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. The document body, though heavily obfuscated, contains text related to 'Analisis de puestos en recursos humanos pdf' and mentions 'wkhtmltopdf', indicating it's likely a lure document. The presence of numerous external links, including the malicious redirector, strongly supports the attack pattern.

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=analisis+de+puestos+en+recursos+humanos+pdf
    • http://files.uintahmuseum.org/uploads/1/3/0/8/130874585/9a05b3e.pdf
    • http://files.wetravelgeorgia.org/uploads/1/3/0/7/130740625/bipoza.pdf
    • http://files.apafss.org/uploads/1/3/1/3/131378821/9993804.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/integer_max_value.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/pojujigopasozudamafusavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/wagujema.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/kagalubamibidite.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/6666686602.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/41892429841.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/33335376576.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/mesetew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/sedemad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/rijazaja.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/39408869726.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/amana_washer_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/jagamifapekuwub.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_off00006d1e.bin
60002b24d429ea83fcbed55c5d9dc3476f34e66ec4a270ae38cf8e13899d01f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 5384 bytes
font_01_sfnt_off00007f46.bin
860a87f2c9f6fa48a870984e93dbb87ee553780e5344fa1a4684424b7d805813
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F46 10668 bytes