Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b397c71bb5c9beb…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 20:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60ca46fc8389912fbc5571f841549add SHA-1: 02c744fd7b36287a3616bbeaebfcbb1af4e96546 SHA-256: 7b397c71bb5c9beb3a998b0e476d4968b2fe94ab9481fabcefd745d7c1aa5a18
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=anglais%20des%20affaires%20pdf%20gratuit'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on shopify.com. The document body, though heavily corrupted, contains fragments of the malicious URL and references to 'Anglais des affaires pdf gratuit', suggesting a lure to a malicious site under the guise of providing a free resource. The primary intent appears to be redirecting users to potentially harmful content.

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/wb?keyword=anglais%20des%20affaires%20pdf%20gratuit
    • http://files.lovenirvanayoga.com/uploads/1/3/0/7/130776485/ninidugego.pdf
    • http://files.littledarlingscookieco.com/uploads/1/3/0/9/130969389/nodisedozininug.pdf
    • http://files.adrianaspina.com/uploads/1/3/1/3/131378838/835a7d092291.pdf
    • http://luvev.theempowermentperspective.com/uploads/1/3/1/8/131871721/4696459.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/zuwulawolegusubevozagula.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/xifudaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6849/7823/files/70939787037.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/46698250313.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/lebakamuxubukanu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/37974879126.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/72454449140.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/negidasagol.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/46192140698.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/atos_institucionais_ditadura_militar.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/sivalobonozal.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_off000064a2.bin
f7ac42a007c8fba845f926282e629a20b04d409e17873fa5716560e001317e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 5200 bytes
font_01_sfnt_off00007659.bin
5aa218a673524fce2fcee71c871fc8cd2caeb7e547e9df117ae15e90a7d875c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7659 11628 bytes

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