Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53a32792e17e2fe…

MALICIOUS

PDF

47.6 KB Created: 2020-08-29 16:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fadacba73d3c698b9b50e35b1d501233 SHA-1: cd2dee4c9934a565c640f4ef3ac2501bc931b937 SHA-256: a53a32792e17e2feaf9d3992326eb31ba92199bcf517eabab5129c16fe99df55
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a download button, intended to lure users to a malicious website. The document body contains obfuscated text and a URL that appears to be the target of the lure. The presence of a link farm heuristic further suggests a malicious intent to distribute links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=editable+lined+paper+for+kindergarten
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/66587775957.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/zonifotavurutulutufusam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/90273680151.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/81621442186.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/44116550168.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/owners_manual_tesla_3.pdf
    • https://static.usrfiles.com/ugd/d55797_fd7c759c45e447909cd63acf29fa2018.pdf
    • https://static.usrfiles.com/ugd/38bf1f_97234c5fc84843bd8e7f48100ebbbaab.pdf
    • https://static.usrfiles.com/ugd/b8c837_6266bfeccb6f4ed397cebcdb63f6a4ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81988232477.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/peguluxivuvoxetatolap.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/binomial_distribution_examples.pdf
    • https://cdn.shopify.com/s/files/1/0464/7888/5032/files/black_eyed_peas_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/vip_access_app.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_off000074e0.bin
73140609119e31de7674df347a82147b0e757401f7355932dda3b969d8848fff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E0 5192 bytes
font_01_sfnt_off0000869d.bin
f3b937849a6c0e2c6d21effc391661928a42328c497159bbd89a9465790e9ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869D 13616 bytes

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