Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0e762de1b1dd34…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 12:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3457cdacda54bf75d9e1e761070b2b59 SHA-1: dc25cb73d38b65a933a5d49a0714cfd07e1af38a SHA-256: ad0e762de1b1dd340adab73e65e47c5ef876a71b392fc128e7004dc7b42d32ee
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 16 external PDF links, including a redirector to a known malicious URL. The primary malicious link identified is https://ttraff.ru/pify?keyword=international+photographer+iceland+map+pdf. The document body, though heavily obfuscated, contains references to the same malicious URL and appears to be generated by wkhtmltopdf, suggesting a potential lure for users to download further malicious content.

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.ru/pify?keyword=international+photographer+iceland+map+pdf
    • http://files.kentishdyes.co.uk/uploads/1/3/0/8/130874613/sapebe-toxekep-dojabojipugo-vajox.pdf
    • http://files.julietdjones.com/uploads/1/3/0/7/130775870/2697513.pdf
    • http://nefigifo.womanscluboftemplecity.org/uploads/1/3/1/4/131452903/misuzeseni-lefuvozel.pdf
    • http://files.stjolin.com/uploads/1/3/0/7/130775668/6f41ee5894.pdf
    • http://files.stjepanpepiskuric.com/uploads/1/3/0/7/130738548/2920330.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/57178195173.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/45621552957.pdf
    • https://cdn.shopify.com/s/files/1/0435/3638/4149/files/61063017033.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43692268827.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/sifevabunezomawugagekan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/jaxevuxigiravume.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/nfl_scores_espn_live.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/96781218960.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/nafogekabegodukewiwajexul.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/pilawixoxim.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_off00005fc7.bin
69877af1a08333e27755ea1c57ce9f8c77878fbc632f6a676ae4d25722cdfc8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC7 5328 bytes
font_01_sfnt_off000071b6.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B6 1800 bytes
font_02_sfnt_off00007a43.bin
aa7c012972bc738dade0c53b22c9d7dcce92aa7661e1b9368f63717c5d15ce45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A43 15380 bytes

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