Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37930c0a24fbaa4…

MALICIOUS

PDF

37.2 KB Created: 2020-08-22 20:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f9c081d6f538bbe55cbbaa43da53252 SHA-1: 3227d287b976b4ef32fb25850c5779c616315b67 SHA-256: c37930c0a24fbaa43874b34157ec1c6f1f26aa7599e9f1381209bd27a0f31469
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to contain the same URL and a list of other URLs, likely intended to create a link farm. The primary attack vector is a social engineering lure using a seemingly benign topic to trick users into clicking the malicious link.

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=dictionary+of+antonyms+and+synonyms+free
    • http://wizas.royalsgardencenter.com/uploads/1/3/0/7/130739267/1464394.pdf
    • http://files.digitalsoftwareservices.co/uploads/1/3/0/7/130740252/90f9da28da.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/neuroplasticity_definition.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/cancellation_of_debt_irs_form_1099-_c.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6142/files/52389226615.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/bioclimatologia_agricola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/3418217356.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/puwidofogedasukevor.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/46338403418.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.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_off0000537b.bin
5e4d40cfc5c36b2c683351076f4e832a3099febaeb5e4cffe752dbe1195609bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x537B 5236 bytes
font_01_sfnt_off00006537.bin
c5618b731a2d0a8b1f1cdeb3da46c559b7b80ac39efce532535488fc34e3e577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 10212 bytes

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