Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6635094fa671a6…

MALICIOUS

PDF

145.9 KB Created: 2020-09-10 11:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65bb3bb8b819366f37ae23cd3a77bff5 SHA-1: c06115c603009b75fae939e966970a41ded8b900 SHA-256: 8a6635094fa671a685be8978792a449fad401c86d579cdac595f8c3ceb0a27e2
120 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, aiming to direct users to external content. The embedded URL, https://ttraff.ru/wix?keyword=gastric+emptying+study+guidelines, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'gastric emptying study guidelines' and the malicious URL, suggesting a lure to a scam or phishing site.

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/wix?keyword=gastric+emptying+study+guidelines
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/veserusugabo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/mantua_township_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/belovefisuwuroridida.pdf
    • https://cdn.shopify.com/s/files/1/0437/6382/6840/files/83195161917.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/reverse_shoulder_arthroplasty.pdf
    • https://cdn.shopify.com/s/files/1/0460/1551/2735/files/60586811558.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/18018486268.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/jifijezetinete.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/nukanapib.pdf
    • https://static.usrfiles.com/ugd/a18aa6_7be90373ae0a4fedbd595d0ae31c708a.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_ec32486ed4b34485af417973ae2b3d1b.pdf
    • https://static.usrfiles.com/ugd/dd4472_12dc960b7db34db09b8469a82f5fcbdb.pdf
    • https://static.usrfiles.com/ugd/9374a7_01a42b02b1cf438e808749ee4fd5b4a7.pdf
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/xaxuzapaxij.pdf
    • https://cdn.shopify.com/s/files/1/0437/6818/4993/files/4540119457.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/47252016137.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.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_off0001e24d.bin
62f4522b5bf0e90901ca158d8c2296ea6437e6526f9bffc44a3a934936ac1737
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E24D 5528 bytes
font_01_sfnt_off0001f50b.bin
2d8642410d111cc210c0e8c2d75bc264dfe30bb0e6394898c0c96a23db4c0e29
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F50B 14872 bytes
font_02_sfnt_off00022435.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080
pdf-font-stream PDF embedded font (sfnt) at offset 0x22435 16148 bytes