Malicious PDF — malware analysis report

Static analysis result for SHA-256 540418904a38ab64…

MALICIOUS

PDF

123.1 KB Created: 2020-08-12 11:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf56be82762981939c5e623a91f8ccc SHA-1: 2839eeb297e7d70e9c7e95608cae57d11717b53f SHA-256: 540418904a38ab64fccf61690a0e33cad5636647463c0f71933355532de2dd95
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. The document body also contains this URL, suggesting it is the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=quantitative+aptitude+questions+tricks+to+solve+pdf
    • http://vuneti.spice-topia.com/uploads/1/3/0/9/130969162/lomili.pdf
    • http://gegawok.artsmartmanila.com/uploads/1/3/2/6/132682156/fuwakunisojob-fifaduzijaluj-xogapabatade.pdf
    • http://nagusejes.majuridesign.com/uploads/1/3/1/6/131636725/siwipikawivofak_gafiv_ponol.pdf
    • http://files.kelownadolphins.com/uploads/1/3/2/3/132302858/wodiximebizerutasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4577/files/bevejal.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/xebes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1952/5534/files/47297786116.pdf
    • https://cdn.shopify.com/s/files/1/0434/4345/4119/files/ratio_decidendi_y_obiter_dictum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/69568017853.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0564/files/xss_filter_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/37590483823.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/93488144247.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/bitsat_syllabus_weightage.pdf
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/hemolytic_anemia_review.pdf
    • https://cdn.shopify.com/s/files/1/0436/5461/1102/files/antimicrobial_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/3d_artist.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178c9.bin
4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178C9 1684 bytes
font_01_sfnt_off0001812d.bin
f450ae79bcf0d89871b63a38d7638b7c03b635487940a02acbca89b861073dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1812D 5460 bytes
font_02_sfnt_off000193d4.bin
4df0381fdb2af2bff78fe1057312fc32ff6bb3ece1dd658dfe0258ca248fbb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193D4 16528 bytes
font_03_sfnt_off0001c74d.bin
56790705e6bda7ac12991edadb348fb49d8e9ac4e8be17705d20ffc48932c188		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C74D 16560 bytes

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