Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab5a59aa2230228…

MALICIOUS

PDF

54.6 KB Created: 2020-08-10 15:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77adf608425202621c7a8b7e27fa37bc SHA-1: 8f00f5a4414999d68c6ba3a6ce9da0aeece6fdbd SHA-256: 8ab5a59aa22302282d7647ccfed26e4f9abf7225bdc064ea4b222b9fe4ce199c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=proyecto+de+grado+pdf'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a PDF link farm heuristic further suggests this document is part of a larger scheme to drive traffic to external 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.cc/pify?keyword=proyecto+de+grado+pdf
    • http://files.fargorunningcompany.com/uploads/1/3/0/7/130739202/6289181.pdf
    • http://files.psychiatristsofdenver.com/uploads/1/3/0/8/130814110/5017681.pdf
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdf
    • http://files.rem5forgood.com/uploads/1/3/0/7/130739369/wosazeborepuboxita.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/wolotatad.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/dekivo.pdf
    • https://cdn.shopify.com/s/files/1/0451/0574/1989/files/latitude_and_longitude_worksheets_answers.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/history_of_african_union.pdf
    • https://cdn.shopify.com/s/files/1/0435/2540/6874/files/canonical_form_of_boolean_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/jamosoforovavuwovafatur.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/11589626487.pdf
    • https://cdn.shopify.com/s/files/1/0436/0614/7230/files/accounting_attachment_report_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0438/8870/5688/files/73603000603.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/magapuwuvudifavininezik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45865267400.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/
    • https://cdn.shopify.com/s/files/1/0436/0614/723

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094fa.bin
f942ee4e27e3dbf7b743f3628e535e4001cfb1996b5b1733fbf2b9692a81bcfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FA 5216 bytes
font_01_sfnt_off0000a6cf.bin
f28dde287f1e3e91915c831aec333c1b5658a435910f46c13824b04ce8277d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CF 11776 bytes

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