Malicious PDF — malware analysis report

Static analysis result for SHA-256 2705a2e2b917aebc…

MALICIOUS

PDF

34.0 KB Created: 2020-08-14 22:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4437d8964751f4a139a3f8d731af839 SHA-1: d446a06553c03656f0b8982096db748a282571c3 SHA-256: 2705a2e2b917aebc8935f61f3b7a4256768e2899e4476b07b1776f432d6bb5fb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself appears to be obfuscated or corrupted, but the presence of the redirector URL and the heuristic firings strongly indicate a malicious link farm designed to lure users to harmful sites. No scripts were extracted from this sample.

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.com/pify?keyword=braveheart+answer+the+question+gif
    • http://files.planningprotocol2.com/uploads/1/3/1/4/131453060/vewinidakido.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/pneumatic_cylinder_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/caffeine_addiction_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/35093174323.pdf
    • https://cdn.shopify.com/s/files/1/0436/7053/6345/files/ayushman_yojana_details.pdf
    • https://cdn.shopify.com/s/files/1/0437/9652/9313/files/basic_english_grammar_azar_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/81156368485.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/47974027976.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/telecharger_je_me_debrouille_en_anglais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/95871732478.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_off0000472a.bin
66c7d97a869ca09cdd637a723746cdefbad14520eb5f396bc5e8f6a9ec82833d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x472A 5324 bytes
font_01_sfnt_off0000595b.bin
d785b7541e10bbe08ccd14c5f0c214c3f8b0106a92e087844d9ca0838333df57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595B 10020 bytes

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