Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec81405ea875ed8f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 21:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e32ce3866b04efb3803dc2d52131a25 SHA-1: 04e2bd65ec4da3a71e33b3351441303a2edffc6c SHA-256: ec81405ea875ed8fd25daa43de6876f8b757e485b11c29c1ac1d375abeb0e612
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=interim+report+portugues'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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/pify?keyword=interim+report+portugues
    • http://vitago.nataliejimenez.com/uploads/1/3/1/0/131070420/dimavegigesu-vizimukax-ranavaror.pdf
    • http://nodotimix.tipdi.com/uploads/1/3/0/8/130874038/kujudososu-faditixazeje-nelekamuvigub.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/90958764874.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/39460249095.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/mavukajudij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1900/9173/files/hybrid_and_alternative_fuel_vehicles_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/titopasaruzeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0983/files/characteristic_function_of_a_set.pdf
    • https://cdn.shopify.com/s/files/1/0444/2708/3943/files/46971798303.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6311/files/vepigupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/54930274777.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/50620222771.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_off00005864.bin
58f40f11002ea3c8fb324e72a51fffc552ca681ed480949b35f698e4f51d32c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5864 4832 bytes
font_01_sfnt_off000068bc.bin
9cfe9aa9a774b691f60d2de3da767b82214a826f188f1a8b9be7bd9e1fe7f1cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 10948 bytes
font_02_sfnt_off00008e4a.bin
687267c9c3db9c7ba5925ba46e702bad05deca9442433a35c4d1c7c9873e4b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4A 16068 bytes

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