Malicious PDF — malware analysis report

Static analysis result for SHA-256 3632fd5f2bd994bd…

MALICIOUS

PDF

33.7 KB Created: 2020-09-02 00:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c5756dcbc69f619916aa07439c21143 SHA-1: 42951b8d43f36e39e07de35639bd78fad230af23 SHA-256: 3632fd5f2bd994bdacee5c9a13f8cea74f02348040b66c3c22dc29bb1e2e4613
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 identifying a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=handbook+of+avian+anatomy+pdf'. This suggests the document is designed to trick users into visiting malicious infrastructure under the guise of providing a PDF. The presence of a large number of external PDF links, many pointing to Shopify, indicates a potential SEO poisoning or link farm tactic to distribute the malicious lure.

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=handbook+of+avian+anatomy+pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/28287022236.pdf
    • https://cdn.shopify.com/s/files/1/0430/2431/8618/files/mems_accelerometer_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/25535887149.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/kizogijalomosotamitizape.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/basic_questions_of_electrical_engineering.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8dad06ab114994a11c46421c81dde1.pdf
    • https://static.usrfiles.com/ugd/b8c837_874d9c6da6c144c6b21e727e9e793d03.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_62b401ea17a64f4dab2feaf4eee38615.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/33769540422.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/hallelujah_piano_accompaniment_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/46656005608.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7345/files/tyler_the_creator_wolf_album_zip_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43034806536.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/google_translate_english_to_swedish.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/lafebivixetujukugiteli.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_off00004728.bin
27c93b79b0b85dad93ef8ae46e24679b998a8dd9d668c958a06f9b1b1074ec4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4728 5208 bytes
font_01_sfnt_off000058dd.bin
73938c23b4e9f344a9d291a86f7334f4400fcf5331d1c62848cec4ddd8b354da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58DD 9736 bytes

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