Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e96d56edc5af40e…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 17:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c964d3bc9b66c0e0a4d1326273e309b SHA-1: 9e51126a463a6a7059465a2414cc0cfa9d7bdfaf SHA-256: 4e96d56edc5af40e565105260fdfea848ff03961356bb78b8d8bb72982a1ccc2
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector service. The document body itself is heavily obfuscated but contains the same redirector URL. The presence of a link farm suggests an attempt to distribute malicious content through a large number of seemingly legitimate-looking PDF documents.

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=endophytic+actinomycetes+pdf
    • http://gaviraban.whitemountainpyrenees.com/uploads/1/3/1/4/131406717/9929849.pdf
    • http://files.rashbionline.com/uploads/1/3/1/4/131437937/javelinemiwamuko.pdf
    • http://vabosof.cruisesceptic.com/uploads/1/3/1/3/131380485/bukuzabu-gezavinubob.pdf
    • http://razetix.artswithaheart.org/uploads/1/3/0/7/130776078/7c726b51664.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/50461049009.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/queen_bohemian_rhapsody_piano_score.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/75864741495.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/1352091230.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/medical_assistant_skills_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0437/4872/0789/files/misuradatezijez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/vanugavirorutogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/874478011.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.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_off00006406.bin
02c28b82646c2ceca9815ed5e5b95cc90dcc7e14c258b063f84b8500f2d17dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 5324 bytes
font_01_sfnt_off0000760a.bin
3a1b70e04ca0718c1942c5a34afe0d1f34370410cbfd558bbb9246d6a8e2dcc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 10152 bytes

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