Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28532d89a59557f…

MALICIOUS

PDF

61.3 KB Created: 2020-07-27 07:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c9607620be6afc4d2b79ca48fd3820 SHA-1: d933e0cf248d4f3848d18187f65582e9d3a5f208 SHA-256: e28532d89a59557f89aeddc5811a60820724b5c26e38d4e493ccb595f42b97b6
128 Risk Score

Malware Insights

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

The PDF contains a lure for a fake 'Application for citizenship certificate form' and embeds a mass of external links. One of these links, 'https://ttraff.ru/pify?keyword=application+for+citizenship+certificate+form', is identified as a malicious redirector. The PDF also contains a link farm hosted on Shopify, with the first identified link being 'https://cdn.shopify.com/s/files/1/0431/4028/4583/files/juvoninugorileto.pdf'. This suggests a social engineering attack aiming to redirect users to malicious content.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=application+for+citizenship+certificate+form
    • http://files.bendlimousine.com/uploads/1/3/2/7/132711954/352fdc34f35a21b.pdf
    • http://files.davidjuliamusic.com/uploads/1/3/0/8/130813881/c718687f99b3b.pdf
    • http://files.tuckerandsons.com/uploads/1/3/0/8/130874060/2da308.pdf
    • http://files.hecmaconference.org/uploads/1/3/0/7/130776795/9765255.pdf
    • http://files.usispo.org/uploads/1/3/1/6/131637135/towoxatijitefurikoz.pdf
    • http://files.usispo.org/uploads/1/3/1/6/131
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/juvoninugorileto.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/wifulozojenetowesowukaxin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/3969192599.pdf
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/boroxudutolomavafen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4864/8354/files/48550696793.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/dabinetogawolimuledobiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/3656547101.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/44195568224.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/38928587889.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/javevividesumiduvim.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/1680858170.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_off0000b247.bin
2c586799e040f244bc98ca4d7d20a256120d6922e3f8cafabdd41028e2585783
pdf-font-stream PDF embedded font (sfnt) at offset 0xB247 5084 bytes
font_01_sfnt_off0000c354.bin
d2f7870531a39821db8755438b1587fffdf912ec69a2ad548b361a6420ff11bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC354 10564 bytes