Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae60bde9d876055…

MALICIOUS

PDF

43.7 KB Created: 2020-08-01 19:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c4f65e951b4b5a353ff89ed92235105 SHA-1: e5e954cd2018245b312e8615c3b52632274989c0 SHA-256: 8ae60bde9d8760553ddbd613bdbcefffcadff3e2ac0ca3733cd3561a9cdfe3e0
120 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a link farm. One prominent URL, https://ttraff.ru/wb?keyword=nlp%20representational%20systems%20test%20pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and other benign-looking Shopify links, suggesting a lure to a malicious site under the guise of providing information.

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.ru/wb?keyword=nlp%20representational%20systems%20test%20pdf
    • http://files.literallyanythingmovies.com/uploads/1/3/0/7/130775134/zosase.pdf
    • http://files.greengateolivegrove.com/uploads/1/3/0/7/130739204/335d30.pdf
    • http://files.rvmaverick.com/uploads/1/3/0/7/130775635/dfac4eaf501.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/how_to_push_project_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3388/files/wesixunubuxutiwuxutex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/43533787000.pdf
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/pajejiwelojerosizopek.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/29298305593.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/popaledegele.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/kusotajagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/petapibigegugugukoken.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/serepibomanufomami.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/minunuguxava.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6824/files/16728865368.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_off00006bdf.bin
73cf48c9bc23372b8fbf65a51b112bd6330e9227682658c898e1719c0537cb76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 5256 bytes
font_01_sfnt_off00007dba.bin
9b4674460dadd603a60eadcb1fed4d4df4cfa04049d1f9e926808384cee04640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBA 10552 bytes

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