Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e75eff17ae7af2…

MALICIOUS

PDF

52.1 KB Created: 2020-08-08 19:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 407d10ab5bd41a12b859d8af8c8b2594 SHA-1: 40d5fae91a34ff9c10dc5aa954739769a41bc392 SHA-256: 52e75eff17ae7af25414ba7c331928a9eec9013965eb893e14da322b71661fd7
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=hernia+discal+lumbar+tratamiento+pdf', which is likely intended to lead the user to malicious content. Another heuristic indicates a link farm, with 'https://cdn.shopify.com/s/files/1/0434/5665/9621/files/zelabufudavino.pdf' being the first listed.

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.cc/pify?keyword=hernia+discal+lumbar+tratamiento+pdf
    • http://files.raincrossinfoservices.com/uploads/1/3/2/6/132695560/bejuxisafodajak.pdf
    • http://files.right-resources.org.uk/uploads/1/3/1/8/131857679/5956744.pdf
    • http://files.elamalawi.org/uploads/1/3/1/4/131406086/zupilo-xokasubavotap-jarepoweta-momoresudat.pdf
    • http://files.gsi-ed.com/uploads/1/3/0/8/130813521/kobimineduta_kupix.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/zelabufudavino.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/21290821372.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/fetudirerewixinin.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/dizutolezuniwakez.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/4612803705.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/52590835885.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/12816351587.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/87696930935.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/cars_and_drives_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/public_private_partnership_projects.pdf
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/ettercap_kali_linux_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/pogiwomukijeninamefogi.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_off00008e8b.bin
7e98d9219f23314bffd3726967c18fe1debd3962fa2cd8789ff52fb6c989941e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8B 5404 bytes
font_01_sfnt_off0000a0d0.bin
24258f4deb96d66e972e1444983eb2105ad65ffcb3d97cf32c23b0ce73756c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D0 10460 bytes

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