Malicious PDF — malware analysis report

Static analysis result for SHA-256 90aa206b94d595e8…

MALICIOUS

PDF

40.8 KB Created: 2020-08-25 22:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a74331933415f86a28f671dfc345262 SHA-1: aa34bba831523ab0ed777d4d0a7da7dc4e4bc53e SHA-256: 90aa206b94d595e85a3c6d6177979b89ce8ade777f657eecc66c72e77eeaaa10
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on Shopify and other domains. One critical heuristic, PDF_MALICIOUS_REDIRECTOR_LINK, flags a link to 'ttraff.ru' which is known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the string 'Integrals of inverse trig' and the URL 'https://ttraff.ru/pify?keyword=integrals+of+inverse+trig', suggesting a lure to disguise the malicious intent. The file is likely used in an SEO spam campaign to drive traffic to malicious sites.

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=integrals+of+inverse+trig
    • http://files.minebricks.com/uploads/1/3/0/9/130969080/ccd188d0ea55.pdf
    • http://files.biblethought.net/uploads/1/3/1/0/131070940/foxasazi-levesuzozuru-zugomave-kojefur.pdf
    • http://files.artofeliamariamc.com/uploads/1/3/1/4/131452880/3c0812f859.pdf
    • http://mowipu.tacvet.com/uploads/1/3/2/7/132741073/delekasodewitedana.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/el_zorro_astuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/20991367200.pdf
    • https://cdn.shopify.com/s/files/1/0443/0761/1804/files/gathering_blue_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/81105534862.pdf
    • https://cdn.shopify.com/s/files/1/0437/8473/2829/files/kanipofekipavelotexub.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/suzop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/55164184518.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/47153614190.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/pixekalanejatepifolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/tegobos.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_off00005b0a.bin
bb831b6a1b7fee05a2b41c106cca024f282695021ca8a760c1af18583197c65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0A 4932 bytes
font_01_sfnt_off00006be7.bin
d8b8a4f9734ac53b22636508dacfa6969204bf1a581eadc3f9e0d0b27e97499b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 13372 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.