Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5b882203a48d2e…

MALICIOUS

PDF

44.3 KB Created: 2020-08-31 16:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03546c470707fc01f398389c36f677fc SHA-1: ed20a3de9c3ad8bed86da500df62bacd83190053 SHA-256: ff5b882203a48d2e5b5a8d8bfe0f7c06cde35c11f6ec5824aec94416019c2822
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify and static.usrfiles.com domains. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=employee+retention+project+report', suggesting a lure for users to click on a report, which then redirects to malicious infrastructure.

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/pify?keyword=employee+retention+project+report
    • https://cdn.shopify.com/s/files/1/0428/1263/7351/files/28900866921.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/16017058186.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/ffxiv_mount_unlock_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8856/7706/files/boney_m_christmas_songs_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/tujuradeke.pdf
    • https://static.usrfiles.com/ugd/99afdc_91058dc9b0e24a5a932754556c90f08d.pdf
    • https://static.usrfiles.com/ugd/96768c_91d970d5ac134e80815373f8c912a1a5.pdf
    • https://static.usrfiles.com/ugd/79e5df_b3c4d968539a4e81b4ea54f9c3ff8e68.pdf
    • https://static.usrfiles.com/ugd/77d535_4c16c8d756cf4b8ea6758400cd20e58e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6e3535898044bbb9b0d3f5731ef2077.pdf
    • https://static.usrfiles.com/ugd/822ecd_0ff9c311e66d43cb9571611535861245.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_off0000714a.bin
f668416f79329fc16f7cccb9ac715df9c35e30d145a43ce40f1dc406705926e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 4824 bytes
font_01_sfnt_off000081a9.bin
3abf5bb5898d32594da2b89cf6c0f03b5e4a3e0614e903a3d0c78edce29bb150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A9 10228 bytes

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