Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5ecdb553116880…

MALICIOUS

PDF

40.5 KB Created: 2020-08-26 20:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a86329a44bcb9b89a4eb73c81a4b16fd SHA-1: cf129aec344e1cff88f860ad99b9e615c0121698 SHA-256: 4a5ecdb553116880956995b71417f7307896a57465d2da5ef1a2d8ecdb0ddeac
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=used+jet+ski+parts+near+me'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com, likely for SEO manipulation to improve search engine ranking. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site.

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.com/pify?keyword=used+jet+ski+parts+near+me
    • http://vusural.allstateglassshowers.com/uploads/1/3/0/7/130740013/3ca920e793c.pdf
    • https://cdn.shopify.com/s/files/1/0435/5411/1656/files/98209242124.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/geranakurunogabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/nafomusazanisogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/zunolebomojak.pdf
    • https://cdn.shopify.com/s/files/1/0434/4374/9029/files/antimalarial_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/0981/files/89852785550.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/allison_transmission_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/3452/2279/files/canada_national_anthem_mp4_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/21074837218.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/taforejop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/estratgias_de_marketing_digital_e_e_commerce_sandra_turchi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/31591379553.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_off00006121.bin
d225c3a92b0504b1e7d21f937a8cba71c437cf5f17c44677443f06624175acac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 5204 bytes
font_01_sfnt_off000072c6.bin
079b1bb2a72617b9355495056831aedcf9163ed8eebacdbcebc9d08361cfc5c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 10152 bytes

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