Malicious PDF — malware analysis report

Static analysis result for SHA-256 c656147bc951a643…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 11:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e647833f5d2a1fc85fc23db46f2d789 SHA-1: e19889cd6731645f9f5f8f934d7156a11d06210c SHA-256: c656147bc951a64358f643ede7692e08084307f0ed5339bf566843e1f5e131ec
120 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 external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Opera mini browser beta for android', suggesting a lure to trick users into clicking the malicious link. The presence of a link farm and a malicious redirector indicates a phishing or redirection attack.

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=opera+mini+browser+beta++for+android
    • http://files.rockinbear.com/uploads/1/3/1/4/131483009/gapezur.pdf
    • http://rarodulik.hampshiresurreyblinds.co.uk/uploads/1/3/1/4/131483416/5496881.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/rodeo_and_juliet_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8340/files/dead_by_daylight_free_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/appendicitis_classification.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/togipijisurilijetuxunesev.pdf
    • https://cdn.shopify.com/s/files/1/0463/5050/0002/files/pazuxuxipot.pdf
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/79799237326.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/access_vba_date_format_yyyymmdd.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/engineering_drawing_basics_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/muxarutam.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_off00006315.bin
a06b577e392d4f70ff3910fecaba32267cc9e86d1fb4c2a7ce62a8931d94ae7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6315 5412 bytes
font_01_sfnt_off0000755f.bin
ab80c55bbe410cd9fe1bc9d85436e22adb953ebeb1b884453977d42c3338c0fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755F 9860 bytes

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