Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee62f5f673968f2…

MALICIOUS

PDF

49.3 KB Created: 2020-08-08 16:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dff9e4a85a129a7c41b30dbeb220b14 SHA-1: 230d2d6b8b804ebdbb03deefd51d4c6cdcda64b7 SHA-256: 4ee62f5f673968f2771f2f6be7266bf608e7b2c82a9c9d01455a914af9ed1140
150 Risk Score

Malware Insights

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

The PDF contains a link farm, directing users to numerous external PDFs hosted on Shopify and other domains. One of the primary links, 'https://ttraff.ru/pify?keyword=behringer+xenyx+1202fx+manual+pdf', points to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm indicates an attempt to manipulate search engine results or distribute malicious content indirectly. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=behringer+xenyx+1202fx+manual+pdf
    • http://files.mosquitomaster.net/uploads/1/3/1/6/131606636/7449760.pdf
    • http://files.golfforlarry.com/uploads/1/3/1/3/131380728/powefesolitavo_mofaxede_tuxuxelagogu_bovuno.pdf
    • http://files.timelessskincarelaserclinic.com/uploads/1/3/1/6/131606201/8229596.pdf
    • http://files.jennifercrowderartist.com/uploads/1/3/1/1/131164310/72c2237aa8ec7.pdf
    • http://files.tilliesschoolofperformingarts.com/uploads/1/3/1/4/131483337/5343512.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73875000904.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/8312429178.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/83964203527.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/jimezunetemabuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/naruto_shippuden_episode_381_english_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/76659501724.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/52311889453.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/jojugusaburaxebisid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/ragoperefijuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/difuwidixurasarodupaba.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/boogie_woogie_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/90557005748.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/97489248989.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/cours_atomistique_liaison_chimique.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_off00007f59.bin
6fcf2d0764a6ea180913efce115794a25f4c817e4e82bdb3b4b78b4d568704e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 5824 bytes
font_01_sfnt_off0000931d.bin
5149c97ed57babec5aeadfdffc7b01b071234bebef37663c3f66c6b0a6eabaed
pdf-font-stream PDF embedded font (sfnt) at offset 0x931D 10812 bytes