Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5cb219113fc123…

MALICIOUS

PDF

57.3 KB Created: 2020-08-30 08:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47ae17e0e4e4b65f53ede618e6242827 SHA-1: bb21d7b90b83313a1e510452b69ac75f3c596446 SHA-256: df5cb219113fc12343d415cdd3b77f7993714cc063b0e4ccbf218b2a1a0bd439
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=algebra+1+book'. This URL is likely intended to lead the user to a malicious site. The PDF also contains a large number of embedded links, characteristic of a link farm, further supporting the malicious intent.

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/wix?keyword=algebra+1+book
    • https://static.usrfiles.com/ugd/e2b09b_a1041cd669b74a0bb4dcb54455e468fd.pdf
    • https://static.usrfiles.com/ugd/79e0dc_de29637d05234af686cecf2af8d3246d.pdf
    • https://static.usrfiles.com/ugd/865d50_d994cbda8f2e47868f511897085f849e.pdf
    • https://static.usrfiles.com/ugd/b8c837_36865808e3de48bf84b4df5d9636c6a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8467/files/ayrshire_roads_alliance_report_a_fault.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/58510777289.pdf
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/17761908907.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/easy_learning_english_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6746/files/miweke.pdf
    • https://static.usrfiles.com/ugd/d43733_9dda7dce705341d28494a25c9f410176.pdf
    • https://static.usrfiles.com/ugd/6908d7_62a84372472e4e42912f704a0213b03a.pdf
    • https://static.usrfiles.com/ugd/67f5f7_8b84e922a84440f693b3c43fa9afb5c8.pdf
    • https://static.usrfiles.com/ugd/1be480_909c321632584fb0bd9ce36a93dcc0f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1036b049c496476fa302a3d9a69dcf2a.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_off000099a5.bin
73d1a081cdab3bfbdec1b54b43a9c5780e01025e4a08fe304e586b610c8aaf91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A5 4920 bytes
font_01_sfnt_off0000aa7b.bin
5be803d4e322fe7a6f4a0fcfe05d16ec2c1e4320870f1d89cd904e7fcae29e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA7B 14484 bytes

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