Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf0fdd17bce7d3b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 21:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f434c1551b6c65d217f75fe49e4ce88 SHA-1: b6f98284019852beb53394e5f021b944208c83ed SHA-256: 4cf0fdd17bce7d3b38a57d0d7d353e068e44ee4c796616ad658b07db87e8585c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to `https://ttraff.cc/pify?keyword=hourly+week+planner+template`. The document body, though heavily obfuscated, also contains this URL and references a "hourly week planner template", suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, some of which are hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=hourly+week+planner+template
    • http://files.artoasis15.org/uploads/1/3/1/6/131606951/f7f74a07.pdf
    • http://files.blacksburgmiddlelibrary.com/uploads/1/3/2/6/132682745/duxamisor_xivid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/sikedisowixuzurif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/pedowosegoginiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/kandungan_nutrisi_cacing_tanah.pdf
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/64461763554.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/present_simple_and_present_continuous_exercises_pre_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/fatalazugegomizaxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/51473862631.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/udp_tracker._open-_internet._nl_6969_announce.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_off00006a3f.bin
bfe79c2c9888cfaca392b027c2692ae3040729b0b0764d742430e42d4693a011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3F 5008 bytes
font_01_sfnt_off00007b4d.bin
651b47a41e1f4f952c0812e02bb9d15db3800143804c6c5fb19c9e7602e6fa06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4D 9948 bytes

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