Malicious PDF — malware analysis report

Static analysis result for SHA-256 28623014ab1f5294…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 00:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64dc4c8d209d088cf24d756b26af2e02 SHA-1: a4355d525fbdc39518ce3d43bb969c957ba6b754 SHA-256: 28623014ab1f52944726d8468e578b0ba7a86d98fb02cc91ea683b9c02d82a9f
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary URL, https://ttraff.com/pify?keyword=the+cask+of+amontillado+pdf+with+line+numbers, is flagged as malicious. While many other links point to benign Shopify domains, the presence of the redirector and the sheer volume of links suggest an attempt to obscure the final malicious destination, likely for a phishing or malware delivery campaign.

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.com/pify?keyword=the+cask+of+amontillado+pdf+with+line+numbers
    • http://files.centervilletxedc.com/uploads/1/3/1/6/131606953/rikajakaxezexaw_nometasef_lekos.pdf
    • http://files.biocoreintegration.com/uploads/1/3/1/4/131453208/5236536.pdf
    • http://karer.odyssey-caruso.com/uploads/1/3/0/7/130776445/melugepuwogu.pdf
    • http://files.coincidencemyass.com/uploads/1/3/1/3/131379789/pamib_wotowijoporudu_suguw.pdf
    • http://files.renuartportfolio.com/uploads/1/3/1/3/131398419/065f8bf71fd7e6.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/african_american_music_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/aprendizajes_clave_primero_de_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/59240527303.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/13804911313.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0452/7413/6738/files/zijezadoganapakuwaxafudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/latiwabivipalesutesavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8419/files/lowizadoxulezetotosito.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/wopusenuxawuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/umd_unofficial_transcript.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/3204716657.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/bukowski_poems.pdf
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/xaputenarugenalamof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/gujadizopedixovazon.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_off00006f7b.bin
e73d2a276c9f515abc20af2bc14bf878591b1adfc30c6a29f6fde4aa6d516f6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7B 5640 bytes
font_01_sfnt_off0000828a.bin
4e4d9bc082d56f7dca59c0e490f825cd10c1a1e2050323ebd0058dfe38ca543f
pdf-font-stream PDF embedded font (sfnt) at offset 0x828A 10100 bytes