Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef33758442c8af71…

MALICIOUS

PDF

38.5 KB Created: 2020-08-11 18:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62c4f5e59baa0140468029bb7d9b021a SHA-1: f13cd7a4c5c38942bfca5dd24cad5db3294bb40c SHA-256: ef33758442c8af713e2daf00f4aafc29f482a4d32fb24ffb347193cc1ccec784
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious PDF

The PDF contains a large number of embedded links pointing to other PDF files, constituting a link farm. One of these links directs to a known malicious redirector, indicating a potential phishing or malware distribution attempt. The presence of a 'download button' lure further supports this. No scripts were extracted, but the structure and linked URLs suggest a malicious workflow designed to lure users to malicious sites.

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=alnor+ebt731+pdf
    • http://files.travelwithgenie.com/uploads/1/3/0/7/130738639/875a332b.pdf
    • http://files.niloufarfarzam.com/uploads/1/3/0/8/130874369/7064865.pdf
    • http://files.jennyginolson.com/uploads/1/3/1/4/131412181/butexagegutudur.pdf
    • http://files.athomeinbedstuy.com/uploads/1/3/0/8/130813913/sifaf.pdf
    • http://robiso.designingaccess.biz/uploads/1/3/1/0/131071164/nimafemor_pupuze_kuvikudufaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/32448925919.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/muxexepetapisegol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/building_materials_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/catch_the_wind_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/38956285088.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/dadixutikozas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/sins_of_a_solar_empire_rebellion_mods.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/petasatazoxakigakefunuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/remove_submodule_git.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/84867541218.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/77382583202.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/dopig.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_off00005738.bin
ec46375b6b8a6a32721bda759ea2f95da8ddf4a1ce30efc74f2ee1599a9d3196
pdf-font-stream PDF embedded font (sfnt) at offset 0x5738 5072 bytes
font_01_sfnt_off00006899.bin
67e0e2a9c898a902eca5f3c4b8baec89ffd17971a7692e509911dbb095c3a243
pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 10332 bytes