Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5222d7873b02c3a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 09:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c39c5fb3c9542ac4ead911acfcf83aa2 SHA-1: 3374a3c16f66225cda77c87da71549acff495ef2 SHA-256: a5222d7873b02c3a71ed4a92091b0d3832975bac34f4461afbdda924b74a4320
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.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack vector appears to be social engineering via a deceptive link.

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=white+rodgers+1f80-+361
    • http://files.safetygradelicensure.org/uploads/1/3/1/3/131398455/7127695.pdf
    • http://files.msbes.com/uploads/1/3/0/7/130776573/zutetejimer-ruvuvi-nokiwevijajapot.pdf
    • http://files.hounganjulian.com/uploads/1/3/1/3/131383283/fetejuvajuterudafab.pdf
    • http://files.nicreconciling.org/uploads/1/3/1/8/131857920/zifawax_zemupepirezized_tukatoxijeda.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/22016336426.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/saxokuxileboler.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/96909916318.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/63756189064.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/nuduwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/ponemolozujuvabof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/57438015362.pdf
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/folizimisikatenobexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/mebibixat.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/22273578698.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_off00006338.bin
2dfd95b9333baca1c9fc7e6d8e01699600f8e50f85790aa1b1a4319a7f1e5e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 5680 bytes
font_01_sfnt_off000076a6.bin
f581466a454731344e6bd7db94c0007c78b0db27389d8ae3a40464f80e73be37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A6 13928 bytes

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