Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9747799aff8ab7d…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 19:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f612e2ad037dee5619bebb652f9fcf3 SHA-1: 15c611d135901d198e77139077ba861145df2ebe SHA-256: a9747799aff8ab7d336ea0175e5f01ebcf6396d305add1f42762572c5f647fc9
120 Risk Score

Malware Insights

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

The PDF file contains a link farm with 17 external PDF links, many hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=pdf+file+creator+apk', redirects to known malicious infrastructure. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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=pdf+file+creator+apk
    • http://rikemu.palmettohighschoolalumniandfriends.org/uploads/1/3/1/1/131164250/1625912.pdf
    • http://files.sylviagborda.com/uploads/1/3/0/7/130775503/xejus-dovasufa-legab.pdf
    • http://files.earthmetaldetecting.com/uploads/1/3/1/3/131383486/0aa6096dc92d1.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/gupojisavereloz.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/alienista_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/26117170316.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/puvowinegur.pdf
    • https://cdn.shopify.com/s/files/1/0433/2394/9224/files/gijilufarutazururuxi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/lopimiwilobosomuzabebi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/73628443685.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5487/files/kowavirafejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/73456468809.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/adobe_scan_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/vamaja.pdf
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/69767047057.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/crochet_flower_pattern_free.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_off000063a2.bin
e174afefb0f7039b4c7cedbb5e7d346e9dd5d274d3399f6c6a6b08f15d2892c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 5036 bytes
font_01_sfnt_off000074cc.bin
39ffe119bd5508d6d5279ad08f67d6893c2e6f2c4ef6e416898d56cfda00eb19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CC 10060 bytes

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