Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bca6bce7c7ff8cd…

MALICIOUS

PDF

42.6 KB Created: 2020-08-18 14:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a6ec2c81e3a82421882f09a1512387 SHA-1: 8970308b264c620544efdd91fce88a45bb33eb6d SHA-256: 7bca6bce7c7ff8cdd01d16b32dd82cbd37d166da83307f23a1174c1bdd98a582
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=college+app+resume+template', is designed to lead users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, many hosted on Shopify. The overall intent appears to be social engineering through a deceptive lure.

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=college+app+resume+template
    • http://files.nickwinter.co.uk/uploads/1/3/1/1/131163872/e7b90f12c.pdf
    • http://wonaride.littlenecknews.com/uploads/1/3/0/7/130738614/6c5c86e75efb.pdf
    • http://files.diversityunitkncirg644.com/uploads/1/3/1/4/131452735/gajonotawipalamovixo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/suspicious_activity_reports_sars_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/tuxafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/gapojusabudijekomiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/jozasixip.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nutatitufatizozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/zovijojanalufasapizepo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/biology_short_notes_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/21721172304.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/16925000059.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/21775276030.pdf
    • https://cdn.shopify.com/s/files/1/0448/0958/4802/files/janatha_garage_songs_telugu_naa.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_off00006b09.bin
f30381f77151730b2a160da8ff14f778a01cb30ce043721166d7cd27c6aa151d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 5044 bytes
font_01_sfnt_off00007c1b.bin
96a9366cd609d38a0821e68aceb54ef08d2d07c74e4808f0fdbea31d37e169fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1B 9868 bytes

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