Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61c394db5be8df8…

MALICIOUS

PDF

40.5 KB Created: 2020-08-12 14:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b8ded203f600598f2c9f35bd540ad3 SHA-1: 196f4a1631094bbec2d093a09b775f8bdd15700d SHA-256: a61c394db5be8df85fe87ee4dcbae36b51ce8695ac2595c3ca8f45ebbb2f86e1
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=case+studies+in+information+technology+ethics+2nd+edition+pdf'. The document body itself is heavily obfuscated but contains this same URL, indicating the primary intent is to redirect the user to a potentially harmful site. 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=case+studies+in+information+technology+ethics+2nd+edition+pdf
    • http://talimu.theworkplacehealthcoach.com/uploads/1/3/0/7/130776795/6dc85f379c8dd.pdf
    • http://files.wellspringyoga.net/uploads/1/3/1/8/131871614/29454c430280.pdf
    • http://pijem.johnsonptsa.com/uploads/1/3/1/4/131438800/rebejewur-wegaripire.pdf
    • http://ludilol.carlhlam.com/uploads/1/3/1/4/131453134/womotezub.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/rivupirelokisub.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/objectives_of_annual_general_meeting.pdf
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/jofuxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/ditej.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4230/files/pirejibataketovewuxizak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/briggs_and_stratton_550ex_won_t_start.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/rinojotevirege.pdf
    • https://cdn.shopify.com/s/files/1/0447/6495/4775/files/nox_installing_random_apps.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6852/files/pericardial_tamponade.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_off00005ee8.bin
4c260dd49bc5e2e7b14c4be0df20336ab3538e3d741a20fd6bc6a21b16b87f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 5708 bytes
font_01_sfnt_off00007232.bin
49894a1ec59895dbece091c093e927cee4fc5baf8dd4788569cad549d89d4df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7232 10180 bytes

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