Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edadf09202a2ca1…

MALICIOUS

PDF

42.8 KB Created: 2020-08-10 13:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44543d800f5ff8c14741a0b365080d06 SHA-1: 98266dd5fe8942ecc29d1714de0164c2dcd7664a SHA-256: 9edadf09202a2ca1b7ca51e8150ec217a94791b982861418a6580cf8f35ded35
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is 'https://ttraff.ru/pify?keyword=website+to+pdf+maker', which is likely used to funnel victims to a phishing or malware-hosting site. The document body, though heavily obfuscated, contains references to 'website to pdf maker' and the wkhtmltopdf tool, suggesting a lure related to document conversion. The presence of numerous Shopify-hosted PDF links, while many are benign, is part of a link farm strategy to improve SEO and distribute the malicious redirector.

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=website+to+pdf+maker
    • http://files.giltnerlogistics.com/uploads/1/3/1/8/131871499/3295696.pdf
    • http://mejuvax.altierilab.org/uploads/1/3/1/4/131483138/9831004.pdf
    • http://files.finditfilms.com/uploads/1/3/1/3/131379761/zamelupulodojob.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/89513381611.pdf
    • https://cdn.shopify.com/s/files/1/0439/4100/3432/files/cours_barycentre_terminale_s.pdf
    • https://cdn.shopify.com/s/files/1/0449/9007/0943/files/fusionner_des_pages.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/glock_armorer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/fekaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/34231513480.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/28231020925.pdf
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/tesililenovapuwabepelenat.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/ante_nicene_fathers_volume_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/mogewiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7697/files/xebasila.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/69514606689.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/44819866756.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_off00006811.bin
87abdbbfcdfdf745a7b46818d3bbd36b0e0b779b5ea6dd8c781debc33a0955bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6811 5372 bytes
font_01_sfnt_off00007a40.bin
d29fe089cc7bb6e92616d8d453dfd6f8e0b27f4f160dffe5d537e80a805db33c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A40 10536 bytes

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