Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5802aefe50929d…

MALICIOUS

PDF

52.7 KB Created: 2020-08-08 06:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3199b61dc3c0a4b1a601d2e6132a9f9 SHA-1: a2535f5f75591a8e5af5d5ba3420cd53138d80eb SHA-256: 7b5802aefe50929d83a82b50448ebec361e617a8798aff1f3534751e0cd99ea5
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm for SEO manipulation or malicious redirection. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=algoritmos+geneticos+inteligencia+artificial+pdf
    • http://files.northbrightonrecording.co.uk/uploads/1/3/1/0/131070336/bb116fe32.pdf
    • http://files.schoenfischlab.com/uploads/1/3/0/7/130775071/petusitasaruwe-bozukeb-soserape-dawugega.pdf
    • http://files.gobrethren.org/uploads/1/3/1/3/131384301/telazufexalamix.pdf
    • http://files.cuestacollegerodeo.com/uploads/1/3/1/4/131483550/f518ae417.pdf
    • https://cdn.shopify.com/s/files/1/0439/9779/0366/files/what_is_a_webhook_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/37544605683.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/fuzajibupaled.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/buderus_gb142_45.pdf
    • https://cdn.shopify.com/s/files/1/0440/3331/0870/files/6981489847.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/tigituliwifoxakevapupijib.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/vatanom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/tixujakozutewesasoxujiwo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/fewogirosisuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/anime_angry_symbol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7143/files/39535025590.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/sealed_portion_book_of_mormon.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/karazamisujolosezox.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_off000089d7.bin
b2e7826fd5cdea0fc02c1b05e69b01242969ff0952761fdba6c52ab2557dd3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D7 5464 bytes
font_01_sfnt_off00009c5b.bin
5e547ffd32f5119fdad672f21a87f2a76a9141abf8a1a6158f5043f00e19f6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5B 12052 bytes

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