Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5a53eb4c07eddb…

MALICIOUS

PDF

42.6 KB Created: 2020-08-07 06:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4220f30c9b4a4ed85a3b0aa76d1bb2a0 SHA-1: 8fc3350645c9191d74e16061889106e735448183 SHA-256: 7c5a53eb4c07eddbc4d2907b3211d53443683dcf47246c51323e03425ca04c10
120 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link redirects to the known malicious domain ttraff.ru. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to disguise the malicious intent. The primary attack pattern involves luring the user to a malicious redirector, likely as a step in a larger phishing or malware distribution chain.

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/wb?keyword=tipos%20de%20variables%20en%20estadistica%20ejemplos%20pdf
    • http://files.tiffanyphillipsrn.com/uploads/1/3/0/9/130969461/1263713.pdf
    • http://boxoxowur.alchemyperfume.com/uploads/1/3/1/0/131069839/mejovede.pdf
    • http://files.howtobookaholiday.com/uploads/1/3/1/4/131408854/zapazonuxew-sadatidubufax-fabotadogomexo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3461/3659/files/bruno_latour_libros.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/decision_support_and_business_intelligence_systems_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/88426315493.pdf
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/88451178301.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/sd_media_luncher.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/18969340997.pdf
    • https://cdn.shopify.com/s/files/1/0431/7455/9893/files/kamixel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/45210023455.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/local_gauge_invariance.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/63130786174.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/80553614882.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/78899882615.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_off000063f7.bin
4aec0497426eb5aba6747b3e1a6100e278a0bf029945a5d0cab44594320450b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 5528 bytes
font_01_sfnt_off000076b3.bin
5d349a28529f40bde2dfd08f765bf5c6884f8450b53b7a6591cd2d890115264b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 11364 bytes

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