Malicious PDF — malware analysis report

Static analysis result for SHA-256 b803bada8a6b2ed5…

MALICIOUS

PDF

40.1 KB Created: 2020-08-16 21:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856a3bf9cf32ebdd123ad1e544505372 SHA-1: 4b8987cf85ed0b714e439199b87557b622edb0c0 SHA-256: b803bada8a6b2ed583d495887a310e2400ab0a2f4700d973a672517f8956e164
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to PDF conversion and includes the malicious URL. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content widely. The presence of a 'download button' lure further supports a phishing or redirection attack.

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=convert+pdf+to+doc+zamzar
    • http://nabifeviw.tnpost289.com/uploads/1/3/1/6/131606289/nafasazasonixu_mijovu.pdf
    • http://ditot.charlestonejc.org/uploads/1/3/2/6/132695366/56fb582b269418.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/8438617664.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/50237828349.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/kubanojixogupewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/95170402891.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/petotimisutaner.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/second_line_old_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5300/files/nugijabeda.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/mifebokarufipifiwek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/movifidudix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2936/3878/files/lorudesojupatowadafuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/woxojuxewukefanel.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/how_do_i_change_discord_bot_permissions.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/
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da1.bin
5717052de400d0718da8758cfbd12b7c9e0538825c1340b75f60c4c3c339fa59
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 5108 bytes
font_01_sfnt_off00006ef5.bin
5174aff668f205fad41fa49e08f756a3f9ce01e1c6be69580f7a4c077cf7adbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 10568 bytes