Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ea836370a95e79…

MALICIOUS

PDF

35.7 KB Created: 2020-08-06 15:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03736681c2bc9adeb42e86766e1799d0 SHA-1: 69cd542b826b097f9c0335d14ad358cd55e6f781 SHA-256: 49ea836370a95e793aef5b337b73f8e0641104feaca2e9f17efb1ba6380057fa
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary redirector URL, ttraff.ru, is flagged as malicious. This suggests the document is designed to lure users into clicking through to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirection scheme.

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=briofitas+de+los+bosques+templados+de+chile+pdf
    • http://files.estateandco.com/uploads/1/3/2/7/132740880/3009455.pdf
    • http://kixapuwa.modson.com/uploads/1/3/1/0/131071157/9223700.pdf
    • http://files.thompsonphoto.co.uk/uploads/1/3/1/8/131856277/pidoxoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/85387322365.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/tikorovarevuroxunej.pdf
    • https://cdn.shopify.com/s/files/1/0435/3101/0199/files/pikexibabajifilotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/wuvunujagafakuvoxonufi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/bojurorexasogifunidom.pdf
    • https://cdn.shopify.com/s/files/1/0436/5425/0654/files/nature_and_scope_of_business_research_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/pikosulogoledafolato.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8354/files/exhibition_stand_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/bermuda_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/28368021158.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_off00004a66.bin
295a6fa4d1372f128abbc20376167e39086aa5d3058748d36889b6e08f35ee62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A66 5712 bytes
font_01_sfnt_off00005da3.bin
2e0c647d7e2332910b7f48886e8a6ffbf99c807657d36c530af9a0b5430dccb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA3 10464 bytes

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