Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cdb8e461d14a9f…

MALICIOUS

PDF

55.2 KB Created: 2020-08-10 05:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c78e3d52dbc987370724f21a05d5331 SHA-1: 08a626f85c4321292ed5fde1ad588977c810ab4f SHA-256: f6cdb8e461d14a9f6d80f6733be85a89884b89da3d0a10e058447c6987e33556
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download button, intended to lure users to a malicious site. The document body also contains the malicious URL and references to downloading a light novel, likely a pretext for the malicious link. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, but the presence of the malicious redirector indicates a link farm for SEO poisoning or traffic generation.

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=arifureta+shokugyou+de+sekai+saikyou+light+novel+download+pdf
    • http://files.houseonreddirtroad.com/uploads/1/3/1/4/131482937/vewakor.pdf
    • http://files.gregheckmann.com/uploads/1/3/1/4/131452811/sovirebituro-xibex-fovomereki-nipuwiwinefis.pdf
    • http://files.jdryart.com/uploads/1/3/0/8/130814226/xugin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/eichmann_trial_transcript.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/55915393325.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8252/files/947121768.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/gekitab.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/clep_psychology_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/jspdf_add_image_png_example.pdf
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/financial_accounting_jr_monga.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/ludiruxe.pdf
    • https://cdn.shopify.com/s/files/1/0448/1276/3298/files/mapa_metro_oporto.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/946321678.pdf
    • https://cdn.shopify.com/s/files/1/0447/4375/3877/files/tall_adirondack_chair_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/6255/8874/files/22842400165.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/67126882315.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/fasimukojokumonirokiroko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008261.bin
a742cd62a013a19612a01ac6e42a87368fb56cf10f4f51a8dc91648a138fe739
pdf-font-stream PDF embedded font (sfnt) at offset 0x8261 6452 bytes
font_01_sfnt_off00009894.bin
aef06467d9840fed40ead7cd5226e7b009d8510a2c0d16a7db016eb44134af5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9894 5608 bytes
font_02_sfnt_off0000abca.bin
d2f93b28b02ef8da9f550fa494a28a0f6f627ed55b56ed0e3ca8c6d72f615887
pdf-font-stream PDF embedded font (sfnt) at offset 0xABCA 10088 bytes