Malicious PDF — malware analysis report

Static analysis result for SHA-256 3287ad30cbfe4686…

MALICIOUS

PDF

49.9 KB Created: 2020-07-30 22:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75d114c8485eb0abf9e5754256862fac SHA-1: 2ea582d0fc3b67be8acfdf48b0f957f7418dfa3d SHA-256: 3287ad30cbfe4686ae392bae69e56a03be9b16467b28588b98295ac222be8dae
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'learning russian workbook pdf'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a compromised or malicious site, likely for further exploitation or credential harvesting.

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=learning+russian+workbook+pdf
    • http://files.amanapopcornandicecream.com/uploads/1/3/1/3/131380337/poluferasitafame.pdf
    • http://files.seattlefirstbaptist.org/uploads/1/3/2/3/132303080/81e42db7c9176.pdf
    • http://files.rivertonmiddleschool.com/uploads/1/3/2/3/132303024/303207.pdf
    • http://files.rivertonmiddleschool.com/uploads/1/3/2/3/132303024/303207
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0432/5628/3296/files/dodizefap.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/54936262316.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/87357887483.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/xopixijopitujuta.pdf
    • https://cdn.shopify.com/s/files/1/0440/5038/2998/files/35661420150.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/weroxibakafogupuzati.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/24466691126.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/60748368982.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/zijegisupazepojev.pdf
    • https://cdn.shopify.com/s/files/1/0439/4795/0248/files/bajexipefapefinamow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5274/files/66092088595.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_off00008433.bin
3c9f7b5c67f3f9648b527b07893ec54c893adf556b45828932782f6c5c47ccc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8433 5216 bytes
font_01_sfnt_off0000960a.bin
a8aa67dfff626b6e4089cd323a9ff98ba762eb84d6181310e6e3f471f4d36d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x960A 11124 bytes

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