Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eff9ddca7872bfa…

MALICIOUS

PDF

33.7 KB Created: 2020-08-09 00:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b33f19a321ee73ae06ad21ec502a2f6 SHA-1: c311871ea9c766262aba5535cb93b042f7424b24 SHA-256: 3eff9ddca7872bfa4ea402a6298f6ba2fb3bfb174ff33dba82678e97aed4706d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=candy+pdf+converter'. The document body, though heavily obfuscated, contains references to 'Candy pdf converter' and numerous URLs, many hosted on Shopify, which is characteristic of SEO link farm abuse. The primary intent appears to be directing users to the malicious ttraff.com domain, likely for phishing or malware distribution.

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=candy+pdf+converter
    • http://files.koasportsleague.com/uploads/1/3/1/3/131397938/pezuna.pdf
    • http://rugesu.stphilipstdenis.com/uploads/1/3/0/7/130739415/sujaf-basaxovolajega-zukizilafajodu-didujamivezu.pdf
    • http://files.pelhamhealthcareassociates.com/uploads/1/3/1/3/131381706/jafidukenos.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/45109382814.pdf
    • https://cdn.shopify.com/s/files/1/0437/7175/6698/files/fekinarasipeba.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/xunejazo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/zexuxufiwewef.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/15544954834.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/42584001730.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/vexukixas.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/49123152686.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/98758646375.pdf
    • https://cdn.shopify.com/s/files/1/0434/9604/6752/files/nefeva.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/poputolaxuzurig.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_off00004762.bin
e5f973b497ad002ee5067c5a9ac0fcec9ee4cfe5599ebcb3887a444a7f128a39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4762 5004 bytes
font_01_sfnt_off0000588a.bin
8682a4f749531f845c0925abfb56a27e3bf725406eff98991793613b3d740634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x588A 9968 bytes

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