Malicious PDF — malware analysis report

Static analysis result for SHA-256 457ecfdf317e003d…

MALICIOUS

PDF

48.0 KB Created: 2020-08-30 16:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7178af2b9f138d133a15fd82bae4991 SHA-1: 41260d35c5d8a55b36bb369a567e59e6ec296dbe SHA-256: 457ecfdf317e003d01c77016afb490e0eeabfa4b1bb275746ddfbac816f42fa0
128 Risk Score

Malware Insights

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

The PDF file contains a prominent link disguised as a download button, directing users to a URL associated with malicious redirector infrastructure. The document body text explicitly mentions downloading an 'adobe pdf reader installer', which is a common lure for malware distribution. The presence of a large number of external PDF links further suggests a SEO-based link farm designed to attract unsuspecting users.

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=download+adobe+pdf+reader+10.1.3+offline+installer
    • https://static.usrfiles.com/ugd/a1fb72_315915015fc54fae920be10dc60461b4.pdf
    • https://static.usrfiles.com/ugd/822ecd_e5d265c31db04e548ce6e81a0099b07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac9312f5205b4856a04b1b900453e37e.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_b956f05d2bc44f93b88e3e85a10baa7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_84925f555f054e87bcf7bacf60537fb1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5706dc71ac81497597232a735f013d13.pdf
    • https://static.usrfiles.com/ugd/89363e_5d801e09c8524ebfa5ccd63d2c982b5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_953abfedc7f847508b178af1a1249c75.pdf
    • https://static.usrfiles.com/ugd/b8c837_f233452c5c7f4ad3997400f5b8f625a5.pdf
    • https://static.usrfiles.com/ugd/238140_b3ac2ae19ae940e495abce189cced4f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03c5b973cf44b979260c8ccfe8d9224.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b2b1b066dc141a9bbc45e3bdc29363e.pdf
    • https://static.usrfiles.com/ugd/d3758e_c6e54640dd86429298885649d21f167f.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_05298978d64d4afdb13c21ebff2b13e8.pdf
    • https://static.usrfiles.com/ugd/76156b_c950b686e2c444e0b1058e8a9b95cfff.pdf
    • https://static.usrfiles.com/ugd/cb2bed_821d0a31c85941358dacf570332c47bc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a5.bin
7afb401f85ff988233daf2a6cde69688ea7f3bc5da984cf815c0f85e8076bcc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 5656 bytes
font_01_sfnt_off0000770a.bin
2630a59b74948291126104b7051f6e34169a22564c50995308b546d818770abb
pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 10112 bytes
font_02_sfnt_off000099db.bin
814af6ed012a992c32226250d6387d0998b1b61b623dbf162780ccc5ea4148f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x99DB 17100 bytes