Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaba5549f9526ff…

MALICIOUS

PDF

42.6 KB Created: 2020-08-09 05:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bc1fe9b9be91cdc299999c021971dd8 SHA-1: 651c8077a27af3f303ef9ceebfc4ac01f7388278 SHA-256: bdaba5549f9526ffa295e8168529f8cc30531b4201d73c4f8b6de627c067a9c9
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to lure users into clicking on a link that appears to be an algorithm course. This link redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, likely for SEO manipulation or to distribute malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=cours+complet+sur+l+algorithme+pdf
    • http://zokero.pcteencourt.com/uploads/1/3/1/0/131070420/840380.pdf
    • http://files.barkerschristmastreefarm.com/uploads/1/3/0/9/130969200/lometedutoni.pdf
    • http://vatox.osntc.org/uploads/1/3/0/8/130873927/nefezakeg_zifepo.pdf
    • http://files.lhsphotographyanddesign.com/uploads/1/3/0/8/130813827/masapolonirebadu.pdf
    • http://files.cackleberrycastle.com/uploads/1/3/2/6/132696117/gozuribimet-girotivoge-fufozepop.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/xejeludaji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/borderlands_2_art_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/59133367715.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1597/files/wireless_network_topology.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/mezigexidolopigosatek.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/diagramme_d_accord_guitare.pdf
    • https://cdn.shopify.com/s/files/1/0428/8443/2038/files/advanced_java_objective_type_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/income_tax_fundamentals_2017.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7422/files/28058522584.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/wobejelezedini.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/24894316468.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_off0000649d.bin
84adba65d85bd63ab6070e665cc7fa438ff7143753ef0435f6b8ca15728e557d
pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 5476 bytes
font_01_sfnt_off0000770a.bin
5f8a52fb13ff5adc07810b1a157306f362c6d37dfed36e07cb98170913fe6152
pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 11796 bytes