Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a5c27fce1e96c6…

MALICIOUS

PDF

46.0 KB Created: 2020-08-20 12:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fc1f62be6191c04865ed9fd64bb4c7b SHA-1: 40bcf27ef9aadb78decaba7ae1a53a7614a446af SHA-256: d8a5c27fce1e96c6049368b8b73d47509940adf3cbbabda1bbd1b9fb8ad5d0aa
120 Risk Score

Malware Insights

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

The PDF document contains a lure related to interview questions and answers, which is a common social engineering tactic. It embeds multiple links, with one identified as a malicious redirector pointing to 'ttraff.cc'. This redirector likely serves to obscure the final malicious destination. The presence of numerous external links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to distribute payloads.

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=situational+type+interview+questions+and+answers
    • http://xunif.theherocloset.com/uploads/1/3/2/7/132740435/d4987a2.pdf
    • http://nojebak.shopvintagedallas.com/uploads/1/3/2/6/132682646/c9c347e.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/47982370231.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/32890850913.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/4824421000.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/47313332366.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/tazipijolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/93919165196.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76410179135.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/super_street_fighter_4_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/19007143515.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/vegeb.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_off00007261.bin
088cf285a4ce37b5d115968d8a43096962a0ee2346b0c1f3bbc811dc399b08ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7261 5436 bytes
font_01_sfnt_off000084fd.bin
05915fb2b68b1ddc40e195bf8b735ec087cfac3d736f9a5db6da7b2408fa90e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FD 11096 bytes

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