Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a2a9df0921bd5f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-11 05:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87d90f3e018c29871c73a50a0902f9ee SHA-1: ef4ca4e9fbae8268f467d7fb1ed186920f9c3cba SHA-256: e5a2a9df0921bd5fe8eb0433e2b0962e1b3c729e5995d16d91f42005824ae51a
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=formation+excel+2020+avanc%25C3%25A9+gratuit+pdf'. This URL is presented within the document body, disguised as a free Excel 2020 formation PDF, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility of the 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.cc/pify?keyword=formation+excel+2020+avanc%25C3%25A9+gratuit+pdf
    • http://files.kellyskylefiles.com/uploads/1/3/2/7/132741225/64e3b.pdf
    • http://dupebev.wranglertheater.org/uploads/1/3/2/6/132682883/5773645.pdf
    • http://puzonev.northwoodshealing.com/uploads/1/3/0/8/130873822/6981354.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/zokanajizof.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/metonobekoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/52335114385.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/duwezixubem.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/viryual_girl_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/5567/7591/files/contemporary_engineering_economics_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/14078167669.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/jesus_bleibet_meine_freude_violin.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/11353024167.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/vuxufusatej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/94403036568.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/nobuzutaxeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/91472460876.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_off000067d9.bin
195032d29d6f9efd06bc201d7e5de5ebd39e2e4df231e00c7601262afa89d5f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D9 5796 bytes
font_01_sfnt_off00007b42.bin
9405195439bbdc4f153c4692a3f4edbc335cfc240924ef4177715b92bfc6ac03
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 12360 bytes