Malicious PDF — malware analysis report

Static analysis result for SHA-256 4762c29439bd014b…

MALICIOUS

PDF

38.6 KB Created: 2020-08-19 10:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0b9b9031e5332542e656c0b2bcd16c0 SHA-1: 5b6757e5c8f75674bd4d36723acfbee1569339b2 SHA-256: 4762c29439bd014b35aeca1294589fbb5d30cfd0e095b33daefcfefc4ec2c573
130 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which are hosted on cdn.shopify.com and appear to be part of a link farm. One critical heuristic identified a PDF redirector link pointing to ttraff.com, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=adelle+condensed+font+free', suggesting a lure to download a font that redirects to a malicious site. The presence of a visual download button heuristic further supports this phishing-like lure.

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.com/pify?keyword=adelle+condensed+font+free
    • http://files.newleafpottery.org/uploads/1/3/0/7/130739174/nenoxim_wekizox_raxosivejiwa.pdf
    • http://files.cartoonsonfilm.info/uploads/1/3/2/6/132695360/77f0723a5fa9521.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/definition_of_life_insurance.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/vuxesasufigemutokedunot.pdf
    • https://cdn.shopify.com/s/files/1/0437/6998/7223/files/texifepalowofinijonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/super_pose_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5895/files/catia_v5_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/how_do_i_get_mtga_to_work.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/73649427877.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/arneth_count.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/bobina_de_encendido_automotriz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/62265962182.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_off00005b0b.bin
941c301f56e2e2cf11d5ae1d1c05555cb04f90704dfc2bda062ef440e654289b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0B 4796 bytes
font_01_sfnt_off00006b5d.bin
4f7789a05d6ca60071180cd386d68dc5ef39f3dfcc575eaae4a84d36dc3e1761
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5D 10024 bytes