Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc508b33d2066f33…

MALICIOUS

PDF

33.1 KB Created: 2020-08-19 00:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6922aa53c744c3fcdc8643327723ceb3 SHA-1: f0127c5ab260132d30c7076425bbebf4ec4cbbec SHA-256: dc508b33d2066f339713f86a99ef10adecdb47f054210314da502d05fb910f53
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack pattern involves luring the user to click the malicious link, which likely leads to a phishing or malware download site.

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=blest+be+the+lord+satb+pdf
    • http://files.cholseybluebirdsfc.co.uk/uploads/1/3/1/3/131379803/dcfeaf4046d6746.pdf
    • http://files.hopeamc.com/uploads/1/3/0/8/130814308/kekowisabo-bijot.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/vopovufoxamedowe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/anualidades_vencidas_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/future_tense_worksheets_for_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/vojedufufajuvilasexagab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5044/2652/files/74379883328.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/66099652466.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/beatles_complete_chord_songbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/81254296745.pdf
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/sulomufebujut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8060/files/biochemistry_satyanarayana_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/android_studio_3._4_tutorial.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_off0000452d.bin
e8dec17710bc74c3c6775dccd692972d77f5fd09a291eecbe312dcffffaba801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x452D 5316 bytes
font_01_sfnt_off0000572d.bin
fb29f6fbf8aa79d7f11862a610b1d2c5f4819ba619dbf11808248571b603d1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572D 9560 bytes

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