Malicious PDF — malware analysis report

Static analysis result for SHA-256 421f834c9e18ab34…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 20:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a46f5e8c4643560343242ef51eb2917c SHA-1: 20c7bf5a9a1d66f23db605cc8000f7c9de4fb5ca SHA-256: 421f834c9e18ab349d963e9a463956a3e77729a9a99a75efff8d4c8a6201dfa8
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=template+for+job+portal+website+free'. This URL is embedded within the document body, suggesting a social engineering lure related to job templates. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=template+for+job+portal+website+free
    • http://dinato.franciaitaliaweddings.com/uploads/1/3/1/4/131438819/zevik-wabumasowisiwo.pdf
    • http://zamafag.chapterncg2.org/uploads/1/3/1/6/131637316/dejigujidak_vukib.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/masojif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/savixelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/87292038092.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/jigefenisunasawuvifus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6565/files/18252848414.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78299439052.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/akele_hum_akele_tum_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/96288282501.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/41195329009.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_off000059a5.bin
8194fef2fe6e0e0cd13a0aa82ab868d78c569c7455b499f0491cdfc9d1d98596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A5 5304 bytes
font_01_sfnt_off00006bab.bin
fb3207c3181c52a39c6d781191ccb9577ef451cd7f600fcdb6b93f5cd9138597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAB 10472 bytes

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