Malicious PDF — malware analysis report

Static analysis result for SHA-256 449e62c9dfea8064…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 00:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80eba98e02f26113310e5ab14d6e1402 SHA-1: ec0b391410d230bdc376c493b00f2b8d52d23a31 SHA-256: 449e62c9dfea806401d3579b5fe09404c675ceb9e7dc29cc1d70d354115845e5
128 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for educational materials, with a prominent link leading to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'ctet question paper pdf 2016' and the malicious URL, reinforcing the lure. The presence of numerous links to benign-looking PDFs hosted on Shopify suggests an attempt to blend malicious links with legitimate content to improve SEO and evade detection.

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=ctet+question+paper+pdf+2016
    • http://files.islandresearchph.com/uploads/1/3/1/4/131438718/jimujakekozebo-gadeluribedegu-zuxakoxivotige-lutepejalit.pdf
    • http://files.bagusnugroho.com/uploads/1/3/1/3/131398547/4298754.pdf
    • http://vilog.worldpaperink.com/uploads/1/3/1/3/131379874/3680600.pdf
    • http://files.benevaanimalhospital.com/uploads/1/3/1/0/131070911/6334014.pdf
    • http://rexepujug.darlingskylineart.com/uploads/1/3/0/8/130873965/cd3969fc.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/powerpoint_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/plant_virology_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/javascript_iterate_array.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/ropibizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/2003_cadillac_cts_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/rerazabikifidibidakofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/99067114635.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/waxawemozuketuzurowufunow.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/wetujapuworivamigin.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/97550987988.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/zusavofimilejitozekazajo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/bullying_el_acoso_escolar_libro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6323/0116/files/acf_image_array.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/
    • https://cdn.shopify.com/s/files/1/0432/6323/0116/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b3.bin
ae9357a1115124d748c1f1ce3d0a410005c13f1e38deb99a9d06c088e554d07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B3 5516 bytes
font_01_sfnt_off00007c7a.bin
edc50af89e911fffb6a0c3ad79fa1561e70f0037ed05c670ee2221df24e05854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7A 10364 bytes

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