Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9f100cbd23aa2e…

MALICIOUS

PDF

42.9 KB Created: 2020-08-03 10:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e6482fb42c06e29e8a3993ffa2e928 SHA-1: 3b916d294242cd4fdd48860a918e01a466a70368 SHA-256: 3c9f100cbd23aa2e2cf557efbc8b707d56b45133582e0aed47ae35996408c7ed
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are disguised as PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial stage for delivering further malicious content. The document body itself is heavily obfuscated but contains references to these links, suggesting a link farm or redirection attack.

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=canon+ae+1+manual+pdf
    • http://files.sanantoniodryervent.com/uploads/1/3/0/9/130969354/12d9505.pdf
    • http://files.claretebboth.com/uploads/1/3/1/1/131164572/xamibolaboba.pdf
    • http://zadimu.backmunicipalconsulting.com/uploads/1/3/1/4/131409309/mitab-fokowagurelunem-wewodimi-posobodobisaxu.pdf
    • http://files.diana-oasis.com/uploads/1/3/0/8/130813639/6408387.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/dota_2_epicnpc.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/fawosudigomotigafilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/12593261719.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/36356799488.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/17458386601.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/72798034809.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/87412976682.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/6663038399.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/3268905068.pdf
    • https://cdn.shopify.com/s/files/1/0431/7636/2150/files/62244409185.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/sukad.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/16691822811.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_off00006a45.bin
b6bdc8c4c05e76a081abcf1b8c82de16a5a7a9a99161bef7bdc2aad9bf144b0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A45 4872 bytes
font_01_sfnt_off00007acb.bin
4b2c9ce3dfa4468d71c11b54debd596268c39b38f6fc1ffe2b0ba5a93dd11999		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACB 10624 bytes

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