Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b1e00ed401fb6b…

MALICIOUS

PDF

46.9 KB Created: 2020-08-14 10:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46db330dda4384c54876cf621af8dd6f SHA-1: e3c428d6885f693a4d5e2676459e0d1a84dfbecd SHA-256: a5b1e00ed401fb6bd93d47388802c9fc6458292f754a48ed900f83a4121ee04b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which resolve to Shopify domains but are likely used to manipulate search engine results or redirect users. The document body contains the string 'Barron's ap biology' and a URL that appears to be the primary malicious redirector, suggesting a lure to a phishing or malware distribution site.

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=barron%2527+s+ap+biology
    • http://files.illlaladesigns.com/uploads/1/3/2/6/132681456/4736275aa01.pdf
    • http://files.meccadance.com/uploads/1/3/0/9/130969708/xunis_pagaloxamazixit_gajagalub_jaragipiradila.pdf
    • http://files.randfishbein.com/uploads/1/3/1/4/131407278/zoloteketemunaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0673/8079/files/lopez_lake_fish_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/30665050961.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/acta_constitutiva_formato_para_llenar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/25659966979.pdf
    • https://cdn.shopify.com/s/files/1/0454/7146/5624/files/urdu_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/gimekodugujanurawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/palos.pdf
    • https://cdn.shopify.com/s/files/1/0436/3629/3785/files/44781232673.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/24355307244.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005741.bin
f5b04c0a54ad312681fca625a1633459b105dd2e8d217497a454578a1ae2ce39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5741 4900 bytes
font_01_sfnt_off000067e3.bin
d1da1c49b64f68b43548af4e7da33e9819ed11a693d59b9eb72fa95087904577
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 10380 bytes
font_02_sfnt_off00008b97.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B97 16092 bytes
font_03_sfnt_off0000a05e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA05E 4324 bytes