Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4f87183f98aaf2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-25 21:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 181413498bc8f3c035735da3fc71a075 SHA-1: ab5e53e2818f79eba9d71dff683f990049d1c992 SHA-256: 4e4f87183f98aaf22dd2fe323a2f1a402fa5f25f656ccc649247802333e17774
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service (ttraff.com), which is likely intended to obscure the final malicious destination. Another critical heuristic indicates a PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt to leverage legitimate platforms for distribution. The document body contains obfuscated text and the primary malicious URL, confirming the redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=public+de+boowa+kwala+uptoten+jeux+p
    • http://files.rudygdesign.com/uploads/1/3/2/6/132681307/ligame-tenejelovove.pdf
    • http://files.mrsdonahue.org/uploads/1/3/1/3/131398095/kuselijixugaxo-jobimadapavi-fogobupa-zepibujibefo.pdf
    • http://files.daniellabloom.com/uploads/1/3/1/8/131856723/fuguriduvufuzupizuji.pdf
    • http://bebef.therawcliffeschools.co.uk/uploads/1/3/1/1/131164394/4275581.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/36174568646.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/26294986965.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/66286110519.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/sexesonewerusemiba.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/fexesozefosopo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3061/files/43177363622.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/xezidawuvimasovin.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/tolomopadumapipumidopoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/photoshop_resize_layer.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/magabenasinomowafaxob.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_off00006ddd.bin
a9b96b2b10b0aaf2c73b90031e94864c8e538770d99c9aada83b9e8865718072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDD 5236 bytes
font_01_sfnt_off00007fc6.bin
b0b5df17c267afd562abf77ad5972ac9a920e2730766b668c53a63ca3e6f2342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC6 11692 bytes

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