Malicious PDF — malware analysis report

Static analysis result for SHA-256 d290640326348072…

MALICIOUS

PDF

58.6 KB Created: 2020-08-18 13:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85e8eb21933be6fa1a272332e305f36b SHA-1: 196549d17f533f9e35f0b882f9fb0c44c0216acf SHA-256: d2906403263480723c4cf072e8e872fbab0623c7696c70970fd0229b8335d364
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is presented to the user as 'Free architectural drafting software'. This link is designed to lead users to malicious infrastructure. The document also contains a PDF link farm heuristic, indicating a large number of external links, with one pointing to a Shopify URL. The primary malicious IOC is the redirector URL.

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=free+architectural+drafting+software
    • http://ruwusog.ssmcommunitybaptistchurch.com/uploads/1/3/0/8/130874104/dagokeb_zuwujugejija_pukorelun_semizusu.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.hardscrabbleroadband.com/uploads/1/3/2/6/132683334/vemijuxigigiwerexepe.pdf
    • http://files.aviewoflondon.com/uploads/1/3/1/4/131438439/8234212.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/demande_attestation_de_travail.pdf
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/dermatitis_atopik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/48110278143.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/51493243285.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/baxupinonarusage.pdf
    • https://cdn.shopify.com/s/files/1/0454/2601/6424/files/dazamapuzipodaravojepedug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/58090063021.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73633131036.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/muxekugusiveborizalubaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/sasokugazukikam.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a27a.bin
b7fd7e4243753ba28f3547953cc4eb64461e67f718dd00976706be954eda7d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27A 5332 bytes
font_01_sfnt_off0000b4a7.bin
c24a5d5c009dd688969b067220be543bc68407616ea95475be068912387430d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 13120 bytes

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