Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5b1cd3477b65c2…

MALICIOUS

PDF

54.0 KB Created: 2020-07-31 19:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d759d252fdb0036592395c4838fa0c4 SHA-1: 43f51c5d6bdd6fb8dd74c701fcf35194400a68af SHA-256: fc5b1cd3477b65c21054cf1114c767dc8b165c6bd2aaf4576c657a8ce1b79efc
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=true+false+python'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of multiple PDF links and a malicious redirector indicates a phishing or scam attempt.

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.cc/pify?keyword=true+false+python
    • http://files.neisdoap.com/uploads/1/3/2/3/132303378/4333660.pdf
    • http://files.msdlaroche.com/uploads/1/3/0/8/130813095/ddae113.pdf
    • http://files.mariosmathtutoring.com/uploads/1/3/2/3/132303219/1084528.pdf
    • http://files.mariosmathtutoring.com/uploads/1/3/2/3/132303
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/51726187974.pdf
    • https://cdn.shopify.com/s/files/1/0429/0517/4179/files/buwejobexemi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/51720315766.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/tazufanukezotefexadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/34569832493.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/tiwoteti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/63348195595.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/kogupitud.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/tanenuzavugofibujidoxig.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/12552300832.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/gokav.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_off00008ea5.bin
ade8a365ed5a51d9ccfbd4cb6c7257f368527596a86b7c583259753dcaff696b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA5 5040 bytes
font_01_sfnt_off00009fcd.bin
ed592e92afeef01127569698922efb006f3d73f5e63e9a732556ad5af2ca1520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCD 13552 bytes

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