Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4719b7c1581ca5…

MALICIOUS

PDF

52.5 KB Created: 2020-08-12 10:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 456722ac685ce479e3d845d937d0b491 SHA-1: 5bcd1bf4b3f3a0984fb58fff82bd051daf0bb65c SHA-256: 1e4719b7c1581ca553f56bb7ebbe2c8a25b68592e2406d503e1d6059320abcfe
120 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains text suggesting it is related to 'anesthesiology self assessment and board review pdf', indicating a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic.

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=anesthesiology+self+assessment+and+board+review+pdf
    • http://files.ldsstrangite.org/uploads/1/3/1/1/131164419/7feaf.pdf
    • http://files.argentkvasnikoff.com/uploads/1/3/0/7/130776724/ba317449e0.pdf
    • http://files.shangrilacenterforhealing.com/uploads/1/3/0/9/130969624/10340c2aa.pdf
    • http://supugoz.claiminghisgrace.com/uploads/1/3/0/7/130738970/201fdeb4efcf770.pdf
    • http://files.shangrilacenterforhealing.com/uploads/1/3/0/
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/47664751598.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/1893421463.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/8609026383.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/wotifekiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5481/files/18535370940.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/78967561882.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/ketomamesusolezikixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/kopusiwevuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/sagujaxofejemorosovufin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/48427040080.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/27426965325.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_off00008c4f.bin
9c9a529f2165cfdce48ce88d8251ab56be2506eaae1f4ad6ddbb28cf1e08b5a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4F 5840 bytes
font_01_sfnt_off0000a010.bin
ecfc8b1cc76f5aa7b91b883ef3d56e03b0839216f7f2052efa78e5e2fe085df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA010 10880 bytes

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