Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b70efe0dceec5e…

MALICIOUS

PDF

69.8 KB Created: 2020-07-30 18:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6828a3d13f439a2e2da1505c944ef39 SHA-1: f8d491be1740f0efac996a4b59591742718cf608 SHA-256: f0b70efe0dceec5ed3abb9d4fa7c8b91b7b7474042ad731b7f9d1b83ffca3236
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting a link farm or SEO poisoning attempt. The primary malicious URL identified is ttraff.cc, which is known to host redirectors. While many other URLs point to Shopify, they are likely part of the link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=appointments%20in%202019%20pdf
    • http://files.beonegallery.com/uploads/1/3/1/6/131637226/paloriwudasexadose.pdf
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • http://files.itchyfeetphotography.net/uploads/1/3/2/3/132303329/5137734.pdf
    • http://files.just5minutesaday.com/uploads/1/3/0/8/130874316/7687634.pdf
    • http://files.yogablackpool.com/uploads/1/3/1/8/131871535/kuposi-kalege.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/xibufikivakefunel.pdf
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/risovixagufakog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/59148158520.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/89202320954.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/vivosibef.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/87030726215.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4903/files/pizadijinakurunefe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/9380528652.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/48786389412.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/tolada.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/63515356862.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_off0000d43d.bin
a18383613e28a0639267ce686005053c0c04f4e11b66f7b33dd09259b04c8b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD43D 5108 bytes
font_01_sfnt_off0000e58c.bin
4faae43e05d29a57530a5f9a0235bd938b83ea4da6253071cc71ffdef83ef95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 10920 bytes

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