Malicious PDF — malware analysis report

Static analysis result for SHA-256 57307035292be31a…

MALICIOUS

PDF

36.7 KB Created: 2020-08-22 12:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72bff269974b0edf6688d1eff7deada5 SHA-1: 4d20632e23a9d34f4074626d94a8910eb95d4035 SHA-256: 57307035292be31af9aeecd44709ffa9a78e9f684d60e7cc172ed5ab692dcb0b
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=standard+enthalpies+of+formation+worksheet', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, potentially for SEO manipulation or to obscure the malicious redirector.

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=standard+enthalpies+of+formation+worksheet
    • http://files.matthewschwartz.org/uploads/1/3/1/1/131164383/738a2deb2cf1.pdf
    • http://miruf.csinsf.org/uploads/1/3/0/8/130814921/4f94e3b4f4efe0b.pdf
    • http://files.janethedietitian.com/uploads/1/3/1/6/131637889/1688134.pdf
    • http://wokidig.risawilliams.com/uploads/1/3/1/4/131438539/ba6a6942d0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/pumegexaxegor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/brahma_vaivarta_purana_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/til_tuesday_voices_carry_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/13499576572.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/68459748100.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/45726444431.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/69196207905.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/flow_free_extreme_pack_11x11_level_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/51841420325.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041de.bin
cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41DE 6492 bytes
font_01_sfnt_off00005212.bin
5cbe00dd4f69753f87d4290f99b024a5c73e6dc8a5783dd7938a7a8dec596b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5212 5540 bytes
font_02_sfnt_off000064c0.bin
dc3f76d047a15fa77e955d32cb9f50cca78d001283a08757f122b2f8a1657fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 9108 bytes

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