Malicious PDF — malware analysis report

Static analysis result for SHA-256 a625e4cb86e97a27…

MALICIOUS

PDF

69.6 KB Created: 2020-08-10 14:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84f4f2ef081d43b826b5cb30fbafba29 SHA-1: ac6820526af5c0d2c7509ae6ae8480e33aa729f3 SHA-256: a625e4cb86e97a273240ab963409a838a5a9d9c1594491f175f64ce10c50089e
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=az+301+dumps+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The primary attack pattern involves luring the user to a malicious site via the embedded link.

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=az+301+dumps+pdf
    • http://files.syrinxfluteandharp.com/uploads/1/3/1/4/131452811/f2bfd9af45d3.pdf
    • http://files.maxwelljc.be/uploads/1/3/0/8/130874162/6857840.pdf
    • http://files.brightonfd.com/uploads/1/3/0/9/130969192/rogilagavoxidojora.pdf
    • http://fotojebi.simplydeliciouswaco.com/uploads/1/3/1/1/131164250/3734309.pdf
    • http://fulenu.kimpacto.com/uploads/1/3/1/0/131070590/gobomelonolixez_wuxonidemu_xilobujinan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/sutunikaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9382/files/buviletepazadis.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/wedonewobutemivad.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/christian_baby_girl_names_with_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/28344948698.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/4688440901.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/11th_zoology_book_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/92250435145.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/air_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/sasuzujovinunasik.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/xisaverojoxud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/difference_between_arbitration_conciliation_negotiation_and_mediation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af3a.bin
6e3a31c9dd8af71b8b0603766cefa687001af29410fe70f2b9ad8d2d386b9f2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3A 5244 bytes
font_01_sfnt_off0000c117.bin
3e1e8fb0fd3852ba55b4fe26e86adb9ced4cd688f0d0ecc52a5c849e7da59138
pdf-font-stream PDF embedded font (sfnt) at offset 0xC117 16200 bytes
font_02_sfnt_off0000f3dd.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DD 16144 bytes