Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e21727710214805…

MALICIOUS

PDF

42.7 KB Created: 2020-09-16 19:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f697bf79ab67f18b74d1da9cba487d6 SHA-1: 29e05838337f0305903b7ff8bb2cbd9db96eac90 SHA-256: 1e217277102148053052de8e9f3b8d36bdec06fb9ffa7f969879593ae4551153
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a malicious redirector link, and another flagged a link farm. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to trick the user into visiting this malicious site.

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.club/wix?keyword=printable+multiple+choice+answer+sheet+pdf
    • https://cd53d502-5b21-410e-b1ee-0aeec2756cf7.filesusr.com/ugd/2e4eb4_f4ec7645f58c4540bb792f6e6734405d.pdf?index=true
    • https://c8b8bdf3-1f20-4b8f-a504-163354937bd9.filesusr.com/ugd/625844_19dc06b291c64c739caca84d4a5a0170.pdf?index=true
    • https://4283a5f3-b5cf-4013-a278-33486ea7302a.filesusr.com/ugd/735189_7fe16acecbb04cb3a529dbc2c7d6a5c3.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/pekevokagejaxusaneb.pdf
    • https://cdn.shopify.com/s/files/1/0462/4436/4448/files/fufafozarupet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/19926968750.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/bezudodawumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9075/files/blame_it_on_the_night_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0445/2660/0351/files/gta_5_lspdfr_swat_callouts.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/bleacher_report_nfl_picks_week_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/xiramovofuwimaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/synonyms_and_antonyms_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/ap_literature_practice_exam.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/algebra_2_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/wavagawororim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/ad_blocker_android_tv_box.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_off0000679e.bin
289f12806c9194b3e5dcd5e8e341ebdc673c9f8f0c7bcaf7a3576c203a9e2e3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 5628 bytes
font_01_sfnt_off00007a9f.bin
099c91aa207159a436b0ba82ffdfd2dc18cdfeb43a7f01f25c2ecbd234750d70
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 10312 bytes