Malicious PDF — malware analysis report

Static analysis result for SHA-256 4604ac50970d0ebf…

MALICIOUS

PDF

32.9 KB Created: 2020-08-01 15:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f76460eb7799aa4e092650b334f7d4b SHA-1: 98e6e61a40be42f55110cde0d979fc0aecca94bd SHA-256: 4604ac50970d0ebfc5e5bb3a74b55a7b5d59d7f3e084b06a27cd160ae6345c07
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=um+4400+124'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, also contains the primary malicious URL, reinforcing the attack pattern. The primary intent appears to be directing users to malicious infrastructure.

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=um+4400+124
    • http://files.esmart.net/uploads/1/3/1/6/131606173/winefupunizu_vajuk.pdf
    • http://files.mybrightwords.com/uploads/1/3/1/4/131438541/fasefuxos-mobelodixitij.pdf
    • http://files.wynning-solutions.com/uploads/1/3/1/4/131437276/d560f6db.pdf
    • http://files.sogo.cc/uploads/1/3/0/7/130775320/ba424ee6.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/vajajubemopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/tidajagadusiloxoxutiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/46798885609.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/libro_anticapitalismo_para_principiantes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/83289880357.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/onan_generator_5500.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/33670814557.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/xatigolasexopeji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/98127106322.pdf
    • https://cdn.shopify.com/s/files/1/0430/6062/5557/files/vebeku.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/60840977927.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/sugikibunex.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_off00004498.bin
72f74d8dce16747149abb5c77f8ebd1ee83988ef7976406bda96b00ab3fc2a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4498 4720 bytes
font_01_sfnt_off000054ab.bin
9580232374f9df3e4d0113423eabe2b68cf84a51d878e7b47b04554c413f5ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AB 11388 bytes

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