Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eeb1bb368bc3ce3…

MALICIOUS

PDF

83.1 KB Created: 2020-08-09 13:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e370ad0eb40068ee2c8e2c7ec79c1eb SHA-1: ac3f409534d1d22b066337f27156805de747d65d SHA-256: 8eeb1bb368bc3ce3dc02b95417eb85c1ab646d95615f49c2d0cf18a682bb2016
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=antimicrobial+activity+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the redirector URL and several Shopify URLs, suggesting a lure to external content.

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=antimicrobial+activity+pdf
    • http://files.hearthsidegames.org/uploads/1/3/1/6/131606951/05f30e.pdf
    • http://files.forma550.com/uploads/1/3/1/4/131437775/valegiva-tulopikar-jelerugokenok.pdf
    • http://files.mygreenage.com/uploads/1/3/0/8/130814355/916560e4151353.pdf
    • https://cdn.shopify.com/s/files/1/0432/1922/2687/files/asignatura_estatal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/50092646539.pdf
    • https://cdn.shopify.com/s/files/1/0429/4836/2399/files/jisibope.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/bugeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/80673275853.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/witudomobijit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/duwot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/73906984138.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/naxalesirarofikerobika.pdf
    • https://cdn.shopify.com/s/files/1/0436/6604/7129/files/dixalawipesiginaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/65848623731.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/loxaridekixuwuwurugokitej.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_off0000fcb9.bin
a91d7b57efb8e84846f867366063f7f38b89337e2b394b7ebbb8d62a8011e670		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 5412 bytes
font_01_sfnt_off00010f17.bin
0d8feaf08e0831f3ff76366abf488f200c20296ae0b805e314f0296417baa14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F17 15676 bytes

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