Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a87056ded9fbd1…

MALICIOUS

PDF

44.6 KB Created: 2020-09-18 15:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df9d0d7b5574c93b15c9ff2b5e001b0d SHA-1: c03f40fc3731d1febf0be2927a286d2c4dd5ebfe SHA-256: 83a87056ded9fbd1fa0537541702e39daf28106ca38de51ea69fa4182bbe21de
170 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector URL that is flagged as malicious, and also hosts a large number of external PDF links, many of which point to potentially malicious domains. The document body text and heuristics indicate a social engineering lure to install a browser extension or download a file, specifically mentioning 'Aptoide apk download for pc'. No scripts were extracted from this sample.

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=aptoide+apk+download+for+pc
    • http://wefabav.jakekalender.com/uploads/1/3/1/4/131413603/xanefev_kojidonu_fokikokokesekak.pdf
    • http://files.riverratsfestival.com/uploads/1/3/1/4/131483592/novulujiligoku.pdf
    • http://tulepejug.rossdanieldance.com/uploads/1/3/1/3/131383314/dc45d162a48590.pdf
    • http://liboju.camptczew.com/uploads/1/3/1/1/131163717/botonis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/35459166253.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdf
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/how_to_program_brighthouse_remote_to.pdf
    • https://cdn.shopify.com/s/files/1/0437/8293/0593/files/23515212008.pdf
    • https://cdn.shopify.com/s/files/1/0452/0306/2933/files/portugal_flannel_sheets_costco.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/spell_or_high_water.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/belle_beauty_and_the_beast_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/pomejujolejo.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_off000063f8.bin
cd9c96badb68c1535cac19af24c72b334ed3928435d3bee66d17d39ec3603b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 4904 bytes
font_01_sfnt_off000074bd.bin
7ac00981c81f1a2d867426deb3d8cfd81aeaebdaa505b26b7561c47549841da7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74BD 10276 bytes
font_02_sfnt_off000097bb.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x97BB 4324 bytes