Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2c06023041e858…

MALICIOUS

PDF

40.9 KB Created: 2020-08-02 18:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31a58013ac797ee54e1279a852d2839 SHA-1: b0fe8ba78dbd760b7597f1a2f59a66834b45bffd SHA-256: fc2c06023041e858a98392aea18cc52bbec1945f7545776550a5ecdc13d58f14
168 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Word update' and presents a visual download button, aiming to trick the user into clicking a link. The primary malicious link, 'https://ttraff.cc/pify?keyword=word+update+all+fields', is identified as a redirector to known malicious infrastructure. Additionally, the document hosts a large number of external PDF links, many pointing to benign Shopify domains, but some are unknown, suggesting a link farm used for SEO poisoning or distributing malicious content. The presence of a browser extension installation lure further supports a social engineering attack vector for malware delivery.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=word+update+all+fields
    • http://files.eatmeh3.org/uploads/1/3/0/7/130775403/7880837.pdf
    • http://files.pahasapagrotto.com/uploads/1/3/1/0/131070313/3b5e1fe.pdf
    • http://files.findstlr.com/uploads/1/3/1/1/131163669/gaxinefidefo-favosokif-wizinamumetukad-wigedikufaloxog.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/71232113240.pdf
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/69848503174.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/kofijukijunex.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/minecraft_id_list_pe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/dozofuxosokawoborig.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7383/files/79070389751.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5793/files/pumaresidupizosovemimu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/42804170077.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/60646813366.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/disusoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/dosimepove.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/25687616860.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_off0000636d.bin
0da9b6472f8df79eec867eb5256478a08c104dc96927fc8c15c187e71166a94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 5048 bytes
font_01_sfnt_off000074b4.bin
9f37e3cac437550f29650f04dd0cfe8f0933683f4a133d86cbb1774c42b1a36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 9980 bytes

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