Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f685a4c5977b87…

MALICIOUS

PDF

52.6 KB Created: 2020-07-28 03:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677c7dc24e783ac81cdc964fc46d3c6b SHA-1: 148918fe39f736a694571505b06c0e700555f5d9 SHA-256: 23f685a4c5977b87bc72177264a23fc6c1ad41e9272554c85179f98ca7f9f61f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links points to a known malicious redirector. The document body is heavily obfuscated and does not provide clear textual clues, but the presence of numerous external links suggests a traffic-driving or phishing attempt.

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/wb?keyword=jpa%202.0%20documentation%20pdf
    • http://files.southcallawayfootball.com/uploads/1/3/0/8/130814226/d33ebe.pdf
    • http://files.sallycasey.com/uploads/1/3/1/4/131408062/9572348.pdf
    • http://files.missfedak.com/uploads/1/3/1/0/131070452/xabusibefatura.pdf
    • http://files.msgfpa.org/uploads/1/3/1/4/131438366/lageniz_ropopirisidi_viganutezuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/19993158487.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/76556006019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/nosifed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/getovolami.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/lometibuxitazifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/70365527595.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9247/files/mosafezajekujomapiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/77586632344.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/38578643725.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80835258875.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/xojebofibono.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/50801448211.pdf
    • https://cdn.shopify.com/s/files/1/0433/1480/6937/files/xezaxepezani.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/liniromujivejuwarunavur.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/
    • https://cdn.shopify.com/s/files/1/0428

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cba.bin
c61f2f97bdb998b4f92c7d56673ece40e5494be2cfb8699af240f2eac3936501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBA 3312 bytes
font_01_sfnt_off0000789c.bin
7fd2aba0b631e9c291c7ddd242dfc26d536a52371cd6311e64a4c178b9773a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789C 5172 bytes
font_02_sfnt_off00008a20.bin
b9f64fe97c3a93ac77a620ae6175fe285b8ca992b4ae50cf04dbe80edf640534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A20 10952 bytes
font_03_sfnt_off0000afbc.bin
523ebb5eba9f40856202eb298b513ffa6644a7d936cfffe3a9af14bdcc763cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBC 16060 bytes

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