Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8cd28d5ec7eadf…

MALICIOUS

PDF

50.4 KB Created: 2020-08-11 02:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dd52a558d2c790cb7ed084a13341b20 SHA-1: 15088e712f0d1619a72079d16f9728ad888ff947 SHA-256: 2a8cd28d5ec7eadf73ce4f3ff24c0db57b1d3504aae3952abec115b65e5c024f
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 pointing to ttraff.com, which is used in a lure for a '506 assignment answer'. The document body also contains this URL, confirming its presence. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify domains hosting PDF files, likely to improve search engine ranking for malicious lures.

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=506+assignment+answer+in+english+pdf+download
    • http://files.onlinepetcaredirectory.com/uploads/1/3/2/6/132683142/420081a7.pdf
    • http://files.fumclaredo.org/uploads/1/3/1/8/131872087/zupirewo_pogelotamanizi_jasij_tukesigijuvota.pdf
    • http://files.montessoritodayinc.com/uploads/1/3/0/9/130968996/e17d9.pdf
    • http://files.flowingbodypilates.com/uploads/1/3/1/4/131437987/daeef.pdf
    • http://files.cagaub.com/uploads/1/3/0/8/130814043/bb7b7a10.pdf
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/nysc_registration_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/88414224441.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/denumed.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/construction_of_calomel_electrode.pdf
    • https://cdn.shopify.com/s/files/1/0428/2001/0140/files/rojipozokerodotefejobuvuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/gastroparesis_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/loguz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/big_java_horstmann.pdf
    • https://cdn.shopify.com/s/files/1/0439/5496/2590/files/centre_of_gravity_formula_for_different_shapes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/62338302465.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/2834934024.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/dapamanetubududezamazodu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1535/5042/files/adenoma_hipofisario_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/cabanellas_diccionario.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_off00007e7f.bin
cf5d38dbb1090e840405fe637fbc0fc580c15c121934d50410e9cb6717d05cc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7F 5872 bytes
font_01_sfnt_off00009252.bin
5099d36a5c184c64b5d4c07fe0b8503559ea5f540950ea32c2da71a02f17fb7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9252 13088 bytes