Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6bfb656bcd9a10…

MALICIOUS

PDF

35.6 KB Created: 2020-08-24 07:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c16dd35b8ee900761d05a0bd98d7b131 SHA-1: 472b997921fc06df88ee1b32cb5ed2e9b7117a13 SHA-256: 2b6bfb656bcd9a1080cead9fc6a48822c5142a73e99d480bac08d0edbdc7fc16
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=verathon+bvi+3000+service+manual', suggesting a lure related to a service manual. The presence of numerous Shopify-hosted PDF links further indicates a link farm designed to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=verathon+bvi+3000+service+manual
    • http://ninowumuf.buckspianomovers.com/uploads/1/3/1/4/131437044/e848001bb09de.pdf
    • http://files.kosloskiart.com/uploads/1/3/1/0/131071041/9351188.pdf
    • http://mizud.sacredsoundandliving.com/uploads/1/3/2/3/132303382/palamuku-kajefamavetigun-lozulufobozemaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/4379/9719/files/nises.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7151/files/62493526838.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/fuwasuduzup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/pifufuruzalofusedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2871/7463/files/pedebadivelunatorapozif.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/sezumirufavogepune.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/20896277883.pdf
    • https://cdn.shopify.com/s/files/1/0450/8496/7077/files/25608213121.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1143/files/taxexeveloniwewoluva.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/14763782400.pdf
    • https://cdn.shopify.com/s/files/1/0438/3470/4034/files/vixufipipukawijaxu.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_off00004c41.bin
4f62e8e2dccad5dccdd57d5fdce13ae06da46c2aeed51b58a981bfaa3e46e2d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C41 5508 bytes
font_01_sfnt_off00005ed8.bin
e7aa780f27b909954858cf49db5afb209f0c545b06ac203233f848b2480fd13b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED8 10312 bytes

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