Malicious PDF — malware analysis report

Static analysis result for SHA-256 a840fd6827a62edd…

MALICIOUS

PDF

43.7 KB Created: 2020-08-28 16:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cf1db86e7af6ce8d76605413c18ec34 SHA-1: e1d9601b53dcf8aa27728ef5549cf0991f93b7f3 SHA-256: a840fd6827a62eddf1863f3c84d9beba97ff9d440bf32598e0716e4d5e311553
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with the primary URL pointing to a known malicious redirector. This indicates a likely attempt to lure users to malicious websites for phishing or malware delivery. The document body itself contains garbled text but includes the primary malicious URL and several other PDF links, reinforcing the link farm attack pattern.

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=yabanc%25C4%25B1+%25C3%25B6znur+y%25C4%25B1ld%25C4%25B1r%25C4%25B1m
    • http://files.friendshcls.org/uploads/1/3/1/8/131871467/6a03116cf28c.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/47147700519.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/84110422103.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/sanamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/wopejatajulujeru.pdf
    • https://cdn.shopify.com/s/files/1/0435/6371/2671/files/mapa_buenos_aires_google_maps.pdf
    • https://cdn.shopify.com/s/files/1/0447/8432/0661/files/caudillos_de_la_revolucion_mexicana.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/fifikefevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/titanic_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7897/files/mapososataximikemewawifis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/37661784654.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/dotawo.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_off00005d60.bin
4fe28d897ef6faa65ab2669e8eaa21d0b2597ea0cdf4134e6c58f992386d1ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D60 4856 bytes
font_01_sfnt_off00006dbe.bin
117e164fff1d7034acfc3dbf83e6e3788425a3d483722a2d5ae2a8f977b47751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBE 11584 bytes
font_02_sfnt_off00009254.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9254 4324 bytes

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