Malicious PDF — malware analysis report

Static analysis result for SHA-256 53be1bc15b98ebe1…

MALICIOUS

PDF

48.5 KB Created: 2020-08-06 17:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1437a2c1ee7618aa927689d482f2b22 SHA-1: def319d2cc9c337ae80cfb8fdad3385c8f0260a1 SHA-256: 53be1bc15b98ebe137ac91922065b4eaa6306e9a261b9fee63a176ac1f6a6de6
160 Risk Score

Malware Insights

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

The PDF contains a social engineering lure, instructing the user to install a browser extension or update to view content. It also contains a link to a redirector service, 'ttraff.com', which is flagged as malicious. The document body itself contains obfuscated text and a URL that appears to be part of the lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used to improve search engine ranking for malicious content.

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.
  • 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
  • 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.com/pify?keyword=upsc+cds+ota+syllabus+pdf
    • http://bumip.escottdesigner.com/uploads/1/3/1/4/131453494/2558726.pdf
    • http://vififo.theyogapathonline.com/uploads/1/3/1/3/131383544/3904113.pdf
    • http://files.johnwtroutman.com/uploads/1/3/1/4/131453214/famitusilabuwo.pdf
    • http://files.winchesterroadanimalhospital.com/uploads/1/3/1/4/131454034/pebenanon.pdf
    • http://luvetuk.monicaburtonyoga.com/uploads/1/3/1/4/131409090/479252.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/gapitegeku.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/92212523395.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/23451591423.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/makalah_askep_atresia_ani_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/tamana.pdf
    • https://cdn.shopify.com/s/files/1/0428/2155/0247/files/selipedipumejig.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/bibivanojafadekobezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/25382702399.pdf
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/47123503680.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/happy_birthday_to_you_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/givux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/pibepidoxales.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/emu4ios_weebly_c.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/mogafevoturexus.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_off000073b8.bin
0af59cb90f4292a21d68bfeece7c305fbf828e2fe89982eb4508701516921efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 5284 bytes
font_01_sfnt_off000085cf.bin
73e98f0af4c19431aef7432e17404ce2fea7c8574c0ab466f8d64826b16e9e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CF 15224 bytes

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