Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fa14bf6a3e09d3…

MALICIOUS

PDF

39.3 KB Created: 2020-09-02 04:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 620a4fbee5972d6a4bfda97b0197d90e SHA-1: e0733983b390f427d42d9804e7197e8e3017c22d SHA-256: c5fa14bf6a3e09d3a6878009d6d0415f6ae578573e732e513cc800b1550678ee
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, disguised as an admit card download. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the primary URL leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many pointing to benign Shopify URLs, likely to obscure the malicious redirector. The SE_DOWNLOAD_BUTTON heuristic suggests a lure for user interaction.

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=mh+cet+admit+card+2019++link
    • https://cdn.shopify.com/s/files/1/0464/9018/9976/files/single_bed_white_fitted_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0459/9942/3647/files/kigopaxogotamitumonow.pdf
    • https://cdn.shopify.com/s/files/1/0448/4051/7792/files/chalean_extreme_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/pavamana_pavamana_song_lyrics_in_kan.pdf
    • https://static.usrfiles.com/ugd/b8c837_942c5375e538440f8284ddcaf11f1afd.pdf
    • https://static.usrfiles.com/ugd/60933b_64f912d567c0442ba8f41dc5526cf386.pdf
    • https://cdn.shopify.com/s/files/1/0437/8991/0167/files/2014_honda_odyssey_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/bg2ee_mods_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/fly_einaudi_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/32815830796.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/tuvoxutugenunijiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/vibipibota.pdf
    • https://cdn.shopify.com/s/files/1/0464/1226/7688/files/8413071798.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/the_thyroid_connection_28_day_plan.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_off00005c08.bin
6c8e463849daf1a6076c51c8f09ce1aad501a6566f9f3de8afb3a4aa2aef14fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 5552 bytes
font_01_sfnt_off00006ecd.bin
e593755d0e585caac8a0fbb6259d79ee2c81cce99eaeca7124784a495d6e3f87
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 9864 bytes