Malicious PDF — malware analysis report

Static analysis result for SHA-256 e551c02096097289…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 15:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3254d7223d75a6d74ca8845657769a6c SHA-1: b505682856ae91596a3069e979fef645381d9ce5 SHA-256: e551c02096097289f17e6239fc377f4f8efb2948cbfd1d01e11d28568bae4399
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified links to known malicious redirector infrastructure, specifically 'ttraff.com', which is likely used to obscure the final destination or engage in SEO poisoning. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body contains text related to 'Powerpoint themes free 2007', which may be a lure.

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=powerpoint+themes+free++2007
    • http://files.anneduffforeducation.com/uploads/1/3/0/7/130738568/471ef410.pdf
    • http://momusaxox.gilmanresearch.com/uploads/1/3/0/8/130874038/tomeladukafuxesutafe.pdf
    • http://kuxiro.miweddingpainter.com/uploads/1/3/2/8/132815806/7847985.pdf
    • https://cdn.shopify.com/s/files/1/0451/0354/6533/files/abc_murders_agatha_christie_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/nulukisununa.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/wupazet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/fate_game_serial.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/gisejafiwapepenomuji.pdf
    • https://cdn.shopify.com/s/files/1/0440/0440/9494/files/vesogafukuxubotisoramava.pdf
    • https://cdn.shopify.com/s/files/1/0449/8187/8942/files/mumadulevodixapimuguxol.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/77330250673.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1782/files/23729824041.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/bafesumow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1558/files/kepetumanozovejimajago.pdf
    • https://cdn.shopify.com/s/files/1/0444/6447/2231/files/le_bilinguisme_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7046/files/appendicular_skeleton_labeling.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_off0000643b.bin
41c5a06518956a2e2960bc55b68337274a08055741829c49deae4e630c965220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 5348 bytes
font_01_sfnt_off0000765c.bin
e89752ff41f70768cb69ba33ebd4ec58ef84f3f53e4f89731d1d20bfbf99835a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 10112 bytes

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