Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1178f6a4f207c8…

MALICIOUS

PDF

43.6 KB Created: 2020-08-11 19:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c071422ecb3ab975a9865d41824cb903 SHA-1: 07d0c85f9f9ebddc2579ecfa1efe24d202f160e3 SHA-256: ba1178f6a4f207c8f1895bb91732cbcc9a5cdc26c5f34e8c618c8c7121675c35
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=diagnostic+tests+for+tuberculosis+pdf, which is likely used to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to 'diagnostic tests for tuberculosis'. No scripts were extracted from this sample.

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.ru/pify?keyword=diagnostic+tests+for+tuberculosis+pdf
    • http://files.thestompdown.com/uploads/1/3/1/4/131407051/fimizujox.pdf
    • http://files.aradsecurityservices.com/uploads/1/3/0/9/130969332/nadopixo-jujinalexiwoz.pdf
    • http://files.communitychurchsheppey.com/uploads/1/3/0/8/130874318/49948dc.pdf
    • http://files.suzanne-redois.com/uploads/1/3/1/4/131454696/3993445.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/88328918335.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/online_editor_with_ocr.pdf
    • https://cdn.shopify.com/s/files/1/0434/1035/8439/files/gigafilevutal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/43605548744.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/32437372829.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/3733/3406/files/lugivekukabapowimifoxoka.pdf
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/wulelukorusolawa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/jekurisusog.pdf
    • https://cdn.shopify.com/s/files/1/0434/6013/3030/files/63399301575.pdf
    • https://cdn.shopify.com/s/files/1/0440/5503/6054/files/autocad_lisp_programming.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/13079819887.pdf
    • https://medlineplus.gov/lab-tests/tuberculosis-screening/
    • 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_off00006b51.bin
51a8e9c65635288cd33659f3a2a057670cd29888fb0b14b96dcf58cc631dbaa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B51 5464 bytes
font_01_sfnt_off00007dec.bin
22a77a4b7e01c0c3ec72658b12568eca604cd16d0aa8a01d06279c8a267da094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEC 10496 bytes

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