Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0faaabf417262dd…

MALICIOUS

PDF

39.7 KB Created: 2020-08-13 00:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6edebe736956008c2e12cdab3e1400c6 SHA-1: 40408fe98431fe3e023738e86de3d9150bcdeb7d SHA-256: a0faaabf417262ddfd7c6de12674d9f40a138318704f3a072bad915e54d91cbc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=curative%20medicine%20pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of numerous links suggests an attempt to manipulate search engine results or to lure users to malicious sites.

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.com/wb?keyword=curative%20medicine%20pdf
    • http://files.mariposa-design-events.com/uploads/1/3/0/8/130874679/mupiza-figarufo.pdf
    • http://files.irtliveblog.com/uploads/1/3/1/4/131453894/xinosivexe.pdf
    • http://files.valleyrootsfoodhub.com/uploads/1/3/0/7/130740344/fa8b50ce.pdf
    • http://files.ogallalalive.com/uploads/1/3/1/6/131606331/c182f.pdf
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/calendario_escolar_2020_mep.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/52268263173.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/95511350925.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/annotated_bibliography_examples.pdf
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/kirulogikegej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tefabojukiva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/13642709723.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/pimiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/vezerumevumesebiwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/kopidejujipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/1193518463.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/gate_mathematics_syllabus_download.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_off00005d81.bin
20605c1a630c289df31b73ba83a2483ed87f4dab381ba0d8cb7e39eac497aae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D81 5056 bytes
font_01_sfnt_off00006ea8.bin
94358fb298d6966c60b0cf980db7e773344610ef601d02f0e904eb700df6c2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 10392 bytes

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