Malicious PDF — malware analysis report

Static analysis result for SHA-256 2522a85de3648644…

MALICIOUS

PDF

38.3 KB Created: 2020-08-16 19:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 802da4206ce394c33b5c42798cf101ae SHA-1: 90c806cd3ef3ba1b35e4c363854ba29336395f51 SHA-256: 2522a85de3648644e90ac7d909b5af701dde1372cf4a186f82417066670607f8
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.com/pify?keyword=kamstrup+btu+meter+installation+manual. The document body, though partially corrupted, contains references to 'Kamstrup btu meter installation manual' and the wkhtmltopdf generator, suggesting a lure to disguise the malicious intent. The presence of numerous links to Shopify-hosted PDFs, many of which are benign, indicates a tactic to blend malicious links with legitimate-looking content.

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=kamstrup+btu+meter+installation+manual
    • http://files.lovefitnessloveyoubyrachel.com/uploads/1/3/2/6/132681985/a94797ba.pdf
    • http://files.valleygraceevents.net/uploads/1/3/0/9/130969505/siwavetizov.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/adultery_judgment.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/small_size_baby_pics.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/zagifol.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/cadena_de_valor_de_un_restaurante.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/zusukakog.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/tulim.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5175/files/94851345429.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/eulerian_and_lagrangian_description_of_fluid_motion.pdf
    • https://cdn.shopify.com/s/files/1/0435/2783/1712/files/biwizatuzugewoweje.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9895/files/welefosigifuruju.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/32705052352.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_off000058ca.bin
476a9b3ca66759dc9223a6f0cdea09c48d7ee4e70598f8afdd28c75f6b07d411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CA 5072 bytes
font_01_sfnt_off000069f5.bin
1e267c767550d8723410b5936404ba1b5e9c39e7a4c0273a602d2ba09184ad76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F5 9764 bytes

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