Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8b3600e9398019…

MALICIOUS

PDF

37.3 KB Created: 2020-08-21 04:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90eb83d6663441cd1ad76fa9e527ad99 SHA-1: a08f10d881dae53319e533b2c660d34880a1db6c SHA-256: cb8b3600e9398019b57ce92f589c7a9e346e115c36239929a18b6c81a941d16e
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, suggesting a social engineering attempt to direct users to malicious content. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=businessman+telugu+ringtones
    • http://files.beebetrained.com/uploads/1/3/1/4/131407944/84be5a3.pdf
    • http://damaji.sitchinstudies.com/uploads/1/3/1/4/131438873/ed8e4451326.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/ledamig.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/xamuxoka.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/homemade_stump_grinder.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/fantasia_model_aiy.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6212/files/baylor_bears_football_uniforms_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/aaina_movie_song_bestwap.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/23571228989.pdf
    • https://cdn.shopify.com/s/files/1/0439/3802/1544/files/xujikuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/zudubolig.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/febenex.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_off000045b4.bin
fe863140d734fb65b1c1a4952a0145987eae325a30863b4318b49ac90591aa3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45B4 4936 bytes
font_01_sfnt_off00005653.bin
0a6e4b6c83460cc5ce52a12c43e0d3b84a586cdf6cdd823246f5f7d76526e86d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5653 10616 bytes
font_02_sfnt_off000078ac.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 4324 bytes

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