Malicious PDF — malware analysis report

Static analysis result for SHA-256 44437804a915fce3…

MALICIOUS

PDF

42.3 KB Created: 2020-08-01 04:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58da05e20cc873e3c71e5cac6a97b283 SHA-1: 3b18eb76364e827b96471add265adf4f0d6fe2c6 SHA-256: 44437804a915fce3a5b83b4d60ba9699cb702ac238baa1eeb038fbef2e334915
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.ru, which is likely used to direct users to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL and references 'fishing leves ffxiv', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, many hosted on Shopify. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=fishing+leves+ffxiv
    • http://files.colganscattle.com/uploads/1/3/0/8/130814346/3791113.pdf
    • http://files.cvintegrativetherapies.com/uploads/1/3/1/0/131070030/lonikigotazafo.pdf
    • http://files.igorkoruga.com/uploads/1/3/1/6/131637131/powozujezisobo.pdf
    • http://files.harrietslaughter.net/uploads/1/3/0/8/130813921/812699.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/zopudojexiwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/8006/2878/files/22657473536.pdf
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/53784217110.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/kefitalosodanulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/27180976805.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/baroxoliwofogobivolo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/kufodinud.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/bunitamojukemubowezunip.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/mapitaliwibizaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/23646277643.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.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_off000064ad.bin
6f9d13215b2bdfc4c9252bfe705908615bfc928a50a5bebd9f46cc09a202113a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AD 4804 bytes
font_01_sfnt_off0000751d.bin
b081b384962603a94fbeb4ded86ebfac6d8dfbebbc324e31bc4d1a586c30261e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 11148 bytes

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