Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f548a42f0ea0d…

MALICIOUS

PDF

46.1 KB Created: 2020-07-31 23:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fea493eac50ca138f26f5bd86d9a7588 SHA-1: 099b17eb8f6deac2f8a00bf2299f3ea9ce15952a SHA-256: e48f548a42f0ea0d155f16190c24026eb050f7139346fb403c8ecdfd8f64481d
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=hex+to+int'. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to Shopify domains, suggesting a link farm or redirection strategy. The primary intent appears to be luring the user to 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=hex+to+int
    • http://files.ellistallman.net/uploads/1/3/1/4/131436956/45f41fdaa6de.pdf
    • http://files.jbandersenart.com/uploads/1/3/0/8/130874633/3202585.pdf
    • http://files.bafwv.org/uploads/1/3/1/4/131454523/xudinak-tutaroro-zugegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/98413135145.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/turob.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/98898262198.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/96373086674.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/kevegufarijimupinebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/tawidivojababovimemume.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/43973774896.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/nazobamewus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/wamomow.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/57759053453.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006843.bin
5bd80a0488894bb5c969ac38be9680cbfe82e1b39867d95c2c3e2b036341c1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 3980 bytes
font_01_sfnt_off000075c5.bin
579f93e1d2b6120ff208d78574eed0ef0edc12c96d839405a75d11b42f763009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C5 12224 bytes
font_02_sfnt_off00009def.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEF 4324 bytes

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