Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ca73a15030e8c4…

MALICIOUS

PDF

67.8 KB Created: 2020-08-30 00:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ceae8198c2b03f8c1a375d6eced5f09 SHA-1: 589fceca55137a6175f02552ff5df065b34e83ea SHA-256: 68ca73a15030e8c417a73401dd82fd06242682231dab453dc023a64d7a35a054
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL `https://ttraff.ru/wix?keyword=tabla+de+calibracion+de+bujias+ngk` is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, suggesting it's the intended destination.

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/wix?keyword=tabla+de+calibracion+de+bujias+ngk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/98857b_647265dca31d4c87896a5ec94411216c.pdf
    • https://static.usrfiles.com/ugd/b8c837_53cc515528e94828ba874173d79c483e.pdf
    • https://static.usrfiles.com/ugd/ca32a8_e70d6351e86346fab329a6eb84f0e5cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_24841f9d180540919a1375c8fd60701a.pdf
    • https://static.usrfiles.com/ugd/b98abb_c6996ae6a766496dbb97c87d48dac519.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/73597633883.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/specification_sheet_of_garment.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/77079120404.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/creating_a_game_with_blender_game_engine.pdf
    • https://static.usrfiles.com/ugd/b8c837_35130c0df6dd4341b1707073b8656f67.pdf
    • https://static.usrfiles.com/ugd/10e3af_663f18070b9c458ba676b897f5175619.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/wofuneri.pdf
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/zuzokumiwajavorapuxozot.pdf
    • https://cdn.shopify.com/s/files/1/0439/3952/8872/files/nerf_cutan_latral_de_la.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/darkness_rises_witch_skill_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/1795/9586/files/abdominal_trauma_management.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcb5.bin
180eb99f7789f1927fd363edb94109f4f08c9010318f6ba564b70d497addebc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB5 5336 bytes
font_01_sfnt_off0000cee7.bin
2a38b08bf4ae53aa6a008f5104bda47c7d33aa9eeccaca83b858a7c999c676fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE7 17232 bytes

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