Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce77605812a3c8a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-09 04:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 073b6c827b59e09170ac4579570fcfa1 SHA-1: 965f52f57ca0a9d2e2284cfbdfc739f02cac189d SHA-256: 8ce77605812a3c8ac132b3c020650844f09a367a6ae0692680edc89a81bf4c19
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily corrupted, contains text fragments that appear to be SEO-related keywords and a URL that matches the malicious redirector. This suggests the PDF is designed to drive traffic to malicious sites, likely for phishing or malware distribution.

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=effectual+entrepreneurship+pdf+download
    • http://wikez.elcaminosband.com/uploads/1/3/0/8/130874038/kolipe-wotibosaja-bibufitax-gexej.pdf
    • http://files.communityplayerstucson.org/uploads/1/3/0/8/130813134/6603057.pdf
    • http://files.hebrewespresso.com/uploads/1/3/1/6/131637839/nilokigilivepuja.pdf
    • http://bepewopu.phhsbigredbands.org/uploads/1/3/0/8/130874359/8841016.pdf
    • http://suramofod.bayareabluesdance.com/uploads/1/3/2/7/132740214/49972f3.pdf
    • https://cdn.shopify.com/s/files/1/0429/9918/5561/files/55752034272.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/rujekiverebojepudesafivu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/durexenatuporoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/67994608971.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/xovomitoxave.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/94420009786.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/ruby_random_string.pdf
    • https://cdn.shopify.com/s/files/1/0437/9777/4497/files/dremel_4000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3504/0664/files/tugir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8527/4024/files/vizikunagezikudovunax.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6811/files/91829533558.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_off000065ae.bin
8cfa01459329943d6595977334e88d39f2556a0f2f70c93656be90bdad54ea30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AE 5292 bytes
font_01_sfnt_off000077bc.bin
5653ff8a0eec12e6311959cde845c064e30f4909b34fa7bacbf0aa3db65045d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 10640 bytes

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