Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b9dc357ba9b20f…

MALICIOUS

PDF

44.9 KB Created: 2020-07-29 17:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ba02e06b7496bac33854e92068466c8 SHA-1: a7e26f10c89bf68d6fec42e31d0237646d9d72d5 SHA-256: d1b9dc357ba9b20f5f3a2b23ddc3c33e0b2c0ec01afb6a034454461a667ef6d7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL identified is a redirector, suggesting an attempt to lead users to a compromised or malicious site. The document body, though heavily obfuscated, contains text related to 'Anaemia workup pdf', likely a lure.

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=anaemia+workup+pdf
    • http://files.weightogoconsulting.com/uploads/1/3/0/7/130739852/9777202.pdf
    • http://files.canarellics.net/uploads/1/3/0/7/130739340/7389437.pdf
    • http://files.berncograssrootsdems.com/uploads/1/3/0/8/130874647/31f3a286432.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/84253554777.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/71715779378.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/sizufogolup.pdf
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/19897698848.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/dotumewujikujizakubegup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1670/files/78066772390.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/50526854097.pdf
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/wuxovibev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/61255780520.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/7706612111.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/lebigegololepovuxirap.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ec.bin
997c6d69d5d4b6edf4005e5f1add1074b3eca3feaaaeeb2f0edee9789ab13d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EC 4924 bytes
font_01_sfnt_off0000849a.bin
f54d90f0b59523516175fb87cdf308719287965842d1fdad3cf9e68726b69f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 10080 bytes

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