Malicious PDF — malware analysis report

Static analysis result for SHA-256 3613f81ab114e80f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-28 08:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b3ad64be33b9718dbe16438c3189207 SHA-1: 6ad98851407e9e0ed9f961d2e990598ecdd9379c SHA-256: 3613f81ab114e80f55797708ae19276eb4c106147365e7858535a420dafbf961
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=netmap+mod%25C3%25BCl%25C3%25BC+indir'. The document body, though heavily obfuscated, also contains this URL and other links hosted on Shopify, suggesting a coordinated effort to distribute malicious content through a network of linked PDFs. No scripts were extracted, and the primary malicious activity appears to be the redirection via embedded links.

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.cc/pify?keyword=netmap+mod%25C3%25BCl%25C3%25BC+indir
    • http://files.hamiltoncofairgrounds.com/uploads/1/3/1/1/131163833/1162749.pdf
    • http://files.bayviewmanagement.com/uploads/1/3/0/9/130969332/1649830.pdf
    • http://toxivowe.welcomehomems.org/uploads/1/3/2/6/132680874/8879881d940327.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/wapaladibadulilovugozox.pdf
    • https://cdn.shopify.com/s/files/1/0440/3567/0166/files/63313972727.pdf
    • https://cdn.shopify.com/s/files/1/0467/9837/3015/files/35872027806.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/wetawukudovunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/14317843719.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/jiraj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2932/3158/files/70363550737.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/25024966480.pdf
    • https://cdn.shopify.com/s/files/1/0437/8807/5159/files/tirade_de_lhypocrisie_dom_juan.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_off00004c47.bin
8288b6940f0faab80281e23ca1283d8d920c332b65ba4f471d405ef18bc1cbfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C47 5016 bytes
font_01_sfnt_off00005cf9.bin
7b4cbb825fb7158a47e59d138016877ba2005ca18bf42537c1fad526e9a725fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF9 6568 bytes
font_02_sfnt_off00006e50.bin
0241350987b2c30f18499e30d4ca2ce743b720fbc60ee3887d187fb69b2b6903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E50 11444 bytes

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