Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eef8dc2b7460c15…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 21:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b2bdfe6669ce65fd610439c52fa0354 SHA-1: 8101f5ed12cb35825070303f761e3a0fd9a4d0db SHA-256: 3eef8dc2b7460c15a7fbfa62eeef9c167abf9d508e70307c2c33bfaf6bdf9b05
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains text fragments that appear to be a lure for downloading a bio data form. This link is likely intended to lead the user to a malicious site or download further malware.

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=online+bio+data+form+pdf+download
    • http://files.eawellshair.com/uploads/1/3/2/6/132696145/mugowogor.pdf
    • http://files.gcfchappell.org/uploads/1/3/2/3/132303351/daxupabe.pdf
    • http://files.vincentschepers.com/uploads/1/3/0/8/130874109/sokazudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/possessivpronomen_bungen_a1.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/20102786642.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/53439148121.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/39605468525.pdf
    • https://cdn.shopify.com/s/files/1/0434/6501/5460/files/14671715679.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/reactions_of_carbenes_and_nitrenes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/banking_and_financial_services_act_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/25983040691.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/99488310442.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/55166783153.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/mamet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/18247559665.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_off00008710.bin
cd1e3039a2db9bd78f0d44f5dd2797605a711ecbcea67655afaa35c256904292		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8710 5268 bytes
font_01_sfnt_off000098ee.bin
d11f45a7874a5cd3f78354019859841043a858876a7cfaa6cb03c982afd29fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98EE 10240 bytes

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