Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7108ae1158261a…

MALICIOUS

PDF

34.2 KB Created: 2020-08-05 08:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 756898a8920ab3a6339b46624f4ff63c SHA-1: 941d6d38e272897a23dc3fad110d918853e42d84 SHA-256: 8a7108ae1158261add5b1cda8e7af78c9f995de8a2732aa869f0dffa61d58dbd
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 Shopify domains but are likely part of a link farm designed to obscure the true destination. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking Shopify URL, suggesting a lure to trick users into clicking malicious links 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.ru/pify?keyword=angular+momentum+in+quantum+mechanics+edmonds+pdf
    • http://files.charlottebaitonphotography.com/uploads/1/3/2/3/132303126/c8e1057f373a6.pdf
    • http://files.picturejapan.org/uploads/1/3/0/7/130739363/b9e492f3626.pdf
    • http://files.brandon-ind-deburr.com/uploads/1/3/0/7/130738823/zewinijo-jirobepoxeduw-bamivemevevedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/tuvonisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5003/2549/files/nosuloxotalovitagos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0536/1821/files/aprilaire_500_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/tefexakaruwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/pibekanodisezog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/nordictrack_cx925_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0942/files/63058748995.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/jusurapoku.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/subevunowuxixitegax.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/fupegu.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_off0000482d.bin
4367aa39bb1aa04c6ef7152e8d64abe8711bdb7e05641b6fae86bcbd11a63c20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x482D 5684 bytes
font_01_sfnt_off00005b4e.bin
49ee4abb0be83192a62d5553badf2b578670a39f4e818ddf7aeef387d9badf1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4E 9576 bytes

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