Malicious PDF — malware analysis report

Static analysis result for SHA-256 392564bc5cfc7411…

MALICIOUS

PDF

42.3 KB Created: 2020-08-14 21:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8de44e8f88ebc616a64435382c244a46 SHA-1: 02847b327fdc36c23fb144c6abe24d033bdfae0d SHA-256: 392564bc5cfc741133e68cac0871afa3e1e42e16c9f9a57a6e038118e4625ea4
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a download for educational material. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link points to known malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates the PDF is part of a link farm, likely to improve search engine ranking for malicious content. The presence of a download button lure further supports the malicious intent.

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=basic+electronics+notes+pdf+free++vtu
    • http://poreg.maisonmiroir.com/uploads/1/3/0/9/130969723/493175.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/ziretipuxutefapogugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/50824798515.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/27522970035.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1146/files/zowulelerixeniwexinolik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0922/files/theodor_adorno_on_popular_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/lofejesimufelebasimiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/8644/4696/files/elevadores_cangilones.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/71548427195.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/12937254023.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/67297407613.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_off00005b44.bin
900d704e218576a039d2645de816aac3c9d9d735732192a752c9050644ae7b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B44 5140 bytes
font_01_sfnt_off00006cc1.bin
f43e8a1896310c4b74029b73575e1b1609e440caa0ca36714476d19f1f2a4583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC1 9860 bytes
font_02_sfnt_off00008e61.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E61 4324 bytes

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