Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ddf3185f1d2c42…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 18:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0395a92983590e09248096e2f1e35631 SHA-1: cea5b191e13515d5f6c9d3da35bf5858042491c4 SHA-256: 95ddf3185f1d2c42afb3353ad36aab7c2b162ed4b90b24c4783b2dc8b0b2c8a5
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Funeral memorial cards free' and the malicious URL, suggesting a lure to a scam or phishing site. The ML classifier also strongly indicated 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/wix?keyword=funeral+memorial+cards+free
    • https://static.usrfiles.com/ugd/b11f6d_e2abb4bb37b14875bab9ba334f52e15e.pdf
    • https://static.usrfiles.com/ugd/921909_eba626dafb7a42558d0f879703c4bf98.pdf
    • https://static.usrfiles.com/ugd/516793_aeb381640dd241ab8156a7e6a8cabd4b.pdf
    • https://static.usrfiles.com/ugd/1be480_2ff22abffb164a0b94d6c250faaf7dcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_02b0a379d22746769e7362df630e0d60.pdf
    • https://cdn.shopify.com/s/files/1/0438/7956/3419/files/85815531503.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/lekijiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/kemarabapitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2061/files/57483735716.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/capital_market_reforms.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/iron_deficiency_anemia_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0463/2680/8737/files/58723019224.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/28465331802.pdf
    • https://cdn.shopify.com/s/files/1/0466/6454/8517/files/kenny_g_sheet_music_soprano_saxophone.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_off000079d0.bin
ed39bc1f7389866de6c17aea6086e7b5ed20037a64ad5c9a82440989540351ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 5124 bytes
font_01_sfnt_off00008b24.bin
d28e6b5af66c92e7f33cedd28a7591ef76dc8568cb29078464ad84884c089db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B24 10316 bytes

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