Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1328ebd7abefa12…

MALICIOUS

PDF

50.1 KB Created: 2020-08-06 23:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89e09888a58b250a62c592787f1b8fbd SHA-1: 0938e9bc13e658523f7aabad097d747f657b8247 SHA-256: e1328ebd7abefa12e4d6dcbd879c6e1053d08ee84603332851ad353f048db627
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. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the string 'autoradiography notes pdf' and the malicious URL, suggesting a lure to trick users into downloading or accessing malicious content under the guise of academic material.

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.cc/pify?keyword=autoradiography+notes+pdf
    • http://files.kateratliff.com/uploads/1/3/2/7/132740949/xidetavinoduni.pdf
    • http://files.davidbarnes-photography.com/uploads/1/3/0/7/130776008/2563450.pdf
    • http://files.wrenphotographynd.com/uploads/1/3/0/7/130739937/gojifajuwetagapu.pdf
    • http://files.exclusivedancerecruitment.com/uploads/1/3/1/4/131436967/4351360.pdf
    • http://files.psuthemeparkengineering.com/uploads/1/3/0/7/130775002/watusirakig.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/29917524294.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/tesutopowa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/63600189155.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/93921438699.pdf
    • https://cdn.shopify.com/s/files/1/0431/6600/7445/files/dulobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/belogovewonidivedoteb.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/59553273694.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/antiarrhythmic_drugs_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/wagokajubamo.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_off00007e6a.bin
41e9a9a7ab6b0eba1a8b4cb10833c9820a3a33bdd5f0922da91b6d42b6719fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6A 5360 bytes
font_01_sfnt_off000090af.bin
a69933b8c340294f7f38d3b054fbcc8b5afbf8e241c8b5b0904ec1e29a1ca34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AF 14000 bytes

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