Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be08f9addf441d2…

MALICIOUS

PDF

45.3 KB Created: 2020-08-21 20:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4abec0237985730785882c1ae323d25e SHA-1: ec7ef9335a8ece12c8cef33b95817747571c81ab SHA-256: 9be08f9addf441d2055afc86270c2254bb1f40effe77b3c8dface8352d8b21ff
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=gym+workout+plan+to+lose+weight+pdf'. This URL is embedded within the document body, disguised as a workout plan. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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=gym+workout+plan+to+lose+weight+pdf
    • http://files.valentinelodge.net/uploads/1/3/2/7/132712530/8310865.pdf
    • http://retin.tileplus.net/uploads/1/3/2/8/132816165/terile-zemozogoregu-dorixu.pdf
    • http://files.drydesign.co.uk/uploads/1/3/0/8/130814205/tevurewegukemi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/37495962260.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/nipixezalinasen.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/wedding_declaration_of_intent.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/generative_adversarial_networks.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/lilafezot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/dopopitalefelijifegipim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/juxabagegonuxen.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/10213776448.pdf
    • https://cdn.shopify.com/s/files/1/0431/5765/1613/files/windows_10_bootable_usb_rufus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0519/0041/files/types_of_validity_in_psychological_testing.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1727/files/servicenow_asset_management.pdf
    • https://cdn.shopify.com/s/files/1/0443/8809/0022/files/buffalo_dairy_farm_design.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_off00007092.bin
dffee92ea8cf4198ac96ba02c4f3ef3df4215bbea29e7e1f3c4f4e11c3d6e5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7092 5744 bytes
font_01_sfnt_off00008415.bin
815cdc74ca8d9bd89e4dbe52779646acc74d1788c291f22855124dcb53f6b4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8415 10512 bytes

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