Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad05de38a348bd9…

MALICIOUS

PDF

44.5 KB Created: 2020-08-25 16:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44fced05a61b995aee83b5432e825eb6 SHA-1: 1a821be1fc9c6d6382d062c5b98ce8c044a5934c SHA-256: 4ad05de38a348bd9d75d48163baff6d8f748f983d06b3a7a3a460d1979b4ff1c
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.cc) and then to various domains hosting PDF files. The document body, though heavily obfuscated, contains text related to 'basic electronics engineering book pdf free' and the malicious redirector URL, indicating a lure to download potentially malicious content. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a phishing or malware distribution attempt.

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=basic+electronics+engineering+book+pdf+free
    • http://divexixu.aboutnatureco.com/uploads/1/3/1/8/131857247/956acbef.pdf
    • http://gutifafew.futurescholarslearning.com/uploads/1/3/0/7/130774982/kenev.pdf
    • http://files.designsbydinius.com/uploads/1/3/0/8/130814397/sodedavuz_vapevaxewitokov_fexufatores_tevodijapaw.pdf
    • http://zudul.alyssarcieri.com/uploads/1/3/0/7/130738902/30bbb3.pdf
    • http://files.goodformanly.com.au/uploads/1/3/1/3/131379732/239140.pdf
    • https://cdn.shopify.com/s/files/1/0448/9232/3995/files/editor_to_word_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/11740612415.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/83555767612.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/pefowiwemofalitagom.pdf
    • https://cdn.shopify.com/s/files/1/0434/4384/7328/files/powowakiwojaxebize.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/sosujeberufoso.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/minecraft_bedrock_edition_entity_id.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005737.bin
79532a8793e58210816c51b93caa78c6bd366a88a8f39720efadb8917714b189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5737 5576 bytes
font_01_sfnt_off00006a21.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 2116 bytes
font_02_sfnt_off000073ed.bin
6c53b86e3dc2b70f872b3aff7315acbadf01abf1e286dca030bb12c8887f6135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 15300 bytes

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