Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca727611325798a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 02:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9af1f491e812bbd728fd8c2f5744465 SHA-1: d4de75857e7871c727174b7bb0efacc4d1346e94 SHA-256: 2ca727611325798af8606b6dee6e4d0c3ee16829408f6439b7bb94fb3af4d427
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious infrastructure, likely as part of a phishing campaign. The document body, though heavily obfuscated, contains text related to 'sepsis campaign guideline' and includes the malicious URL, reinforcing the phishing lure. The presence of numerous external PDF links suggests an attempt to obscure the final destination or engage in SEO manipulation for broader reach.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sepsis+campaign+guideline
    • http://tutik.matrixbathroomsandheating.com/uploads/1/3/1/8/131871505/dewafawu.pdf
    • http://files.iooftxgreaterhouston.org/uploads/1/3/1/4/131406372/2250752.pdf
    • http://zarevi.westhavenhoa.com/uploads/1/3/2/3/132302815/mazetir-bobikevuto-wepotite-pupamefi.pdf
    • http://kokar.she-racreations.com/uploads/1/3/1/0/131070374/5249410.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/doxodejuparumekupiriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/15105786078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/vewenilefap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/71401863769.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/xusefabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2416/1704/files/bosch_accelerator_pedal_position_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/xinamuzugemexumok.pdf
    • https://cdn.shopify.com/s/files/1/0437/4216/7189/files/jisexopiselinuxipat.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_off000061b1.bin
1398a5bf73cb516b5cb6fe99ff9d377809583b43f29a9cd53a6ba8d86db9e1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 5400 bytes
font_01_sfnt_off000073f2.bin
ea32a239493877a02455c5b6ddb2679d84936f6701f55f1bbc457368bc3c772d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F2 10100 bytes

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