Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4c46864b191ea6…

MALICIOUS

PDF

47.0 KB Created: 2020-09-01 16:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7709f0b97d7ae0d4c27168791497dc69 SHA-1: 2291751e3b10d24b1569473e3dc2b65ba2074354 SHA-256: 9a4c46864b191ea6103f94d0f4dbd6e1c67d54065936367880210d95c4c0522d
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains text related to a 'sports logo quiz app answers' and the malicious URL. The presence of a link farm heuristic further supports the malicious intent of directing users to external sites.

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/wix?keyword=sports+logo+quiz+app+answers
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/23688672556.pdf
    • https://cdn.shopify.com/s/files/1/0432/9694/8382/files/penatalaksanaan_bronkopneumonia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/cephalosporins_antibiotics.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/bhajan_dj_sound.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/48980836278.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/leiomyoma_treatment_guidelines_acog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/maharashtra_state_information_in_marathi_language.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/62630954916.pdf
    • https://static.usrfiles.com/ugd/b65acf_b4b342024c2b4d658b2fd873a2698c0d.pdf
    • https://static.usrfiles.com/ugd/64f9d2_2e0986e2cb724c92b945f537a05082d9.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_off000079d5.bin
46f4fb4c8a855201ff9a1ea3a36735e869d4694c37ec80a1215409d06e3fc8de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D5 5356 bytes
font_01_sfnt_off00008c2d.bin
3d1e21b8e83a6be6dc8e543df130742d554619bb9fa73f142a12bb949da99ebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2D 10388 bytes

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