Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b8f1c3a9d66d30…

MALICIOUS

PDF

42.2 KB Created: 2020-09-02 19:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68ff1baf68e0fdd2135d6f19c3d8907e SHA-1: d20a245249efab94cbe8600ed005ae2a407c2c96 SHA-256: a8b8f1c3a9d66d30b3259c4a8edc11022122c878eb538257a0e9766c0e47c7d3
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, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=beautiful+wallpaper++girl', is designed to redirect users to malicious infrastructure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains, likely to improve search engine ranking for malicious content.

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.me/wix?keyword=beautiful+wallpaper++girl
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/certificate_template_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0464/6938/2302/files/happy_birthday_video_songs_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0465/0467/3430/files/audio_player_library_android_github.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/12778577565.pdf
    • https://static.usrfiles.com/ugd/55f640_cb5f929f7ac14443b9ff0e08fe209ee9.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_f8f0d9809ef448599b97aace84abd08d.pdf
    • https://static.usrfiles.com/ugd/1a89c8_c8d2486135e242ba8fa10882d2d4113e.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/introductory_quantum_mechanics_liboff_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4392/files/38441500180.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/lavefajomegepebizez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/95802265628.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/18061093686.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_off000067af.bin
f5ac1fe121bed8e41ee2cede9570ccfc5bba18bc982b30438b4200c54e9ac92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 5032 bytes
font_01_sfnt_off000078fa.bin
184f2ea07b5728b0b2a622abebbff66d67915ca7095c553bb83b2ac2153ac3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 10364 bytes

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