Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f28a31693c3ccb1…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 08:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c579d0d16267f0b66af836a7975073d SHA-1: 931db7719f657f669db037224d92a01d72e65ddb SHA-256: 3f28a31693c3ccb10c9e3bf93f438b5ac28667668a44dbb690dc16c7dd4fa503
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=blue+background+free'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. While the document body is heavily obfuscated, the presence of the malicious URL and the link farm behavior strongly suggest a phishing or malware distribution attempt. No scripts were extracted from this sample.

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.com/pify?keyword=blue+background+free
    • http://files.chinatownbranch.com/uploads/1/3/0/8/130874250/55cb07d3e90.pdf
    • http://files.foxlairwest.com/uploads/1/3/1/4/131454699/nubefuduraruma.pdf
    • http://files.nationalduals.org/uploads/1/3/2/6/132696558/bevob_nivubametaban_guxeramivijutem_romilikavugi.pdf
    • http://files.valgbbo.com/uploads/1/3/0/9/130969742/d4500.pdf
    • http://files.kathrynmwhitesel.com/uploads/1/3/0/7/130739590/bolosubuzax.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/country_code_ee.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/33650233212.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/brain_drain_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/dazorud.pdf
    • https://cdn.shopify.com/s/files/1/0447/3736/4117/files/79982624290.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/zevebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/wise_driver_care.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/pakujazekagu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/drugi_svetski_rat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/23964219393.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/mafivodezuso.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/thin_black_line_on_nail.pdf
    • https://cdn.shopify.com/s/files/1/0428/0467/4727/files/vimit.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/1/0435/0771/2155/files/thin_black_line_on_nail

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000676f.bin
62002192aa0678ef118b4f24ade0ac5892e487ca9f198ab07da90dd09e93cf01
pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 5264 bytes
font_01_sfnt_off00007964.bin
862cd0fff58b0e51700535ff321e0e75f112e985765f635afaf2023b6595a3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7964 10316 bytes