Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd143631397e4568…

MALICIOUS

PDF

39.4 KB Created: 2020-08-20 23:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0524b987d38502bf5d520232a6b1290 SHA-1: 37c6e0d3c4d85e16fcac116ecf1b6e9f8d25d587 SHA-256: dd143631397e4568cb1e1015a0401737973c036c74d529863ae465dcd986f279
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to 'iCloud for Windows'. This suggests a phishing or social engineering attempt to lure the user to a malicious site. The document also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=icloud+for+windows++all+pictures
    • http://ledapovam.marion-dewar.com/uploads/1/3/0/7/130775195/3039288.pdf
    • https://cdn.shopify.com/s/files/1/0434/4591/1709/files/76242693449.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/vexatuwibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/95797193991.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/zajizene.pdf
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/fifa_score_sheet_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/70482727964.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/australian_ethical_super_fund_performance.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/17540541724.pdf
    • https://cdn.shopify.com/s/files/1/0431/3582/8124/files/gojupuvujusiropaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/applications_of_mathematics_in_economics.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/36549089362.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_off00005ab0.bin
f23b0508d5b4c33e6f0681ba2a49e4a0058fee25c20e2dfc774577ccd9528685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB0 5176 bytes
font_01_sfnt_off00006c64.bin
41981e4e3c0eafed9ab3c0ac2dd02b95cd058f5ed9cc6cb87162d84b32194c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C64 10676 bytes

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