Malicious PDF — malware analysis report

Static analysis result for SHA-256 28744e748de2b8d2…

MALICIOUS

PDF

41.5 KB Created: 2020-08-07 00:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8252e84c3c3a59f59b8362f6b10dd9e SHA-1: 74f489bc84b0e6d0e1f2e3aaf398e2a782b4b62d SHA-256: 28744e748de2b8d25dab5b34cf782e3d867ce6c07bc8c2a26bdb28d3c5f32137
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which are part of a link farm designed to improve search engine rankings. One prominent link, disguised as an 'Avon catalogue download', redirects to a known malicious URL (ttraff.ru). The presence of a visual download button further supports the lure. The file's structure and the embedded links suggest a phishing or redirection attack aimed at leading users to malicious content.

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=avon+catalogue+august+2020+download+pdf
    • http://files.customhighlightvideos.com/uploads/1/3/1/3/131384424/lamodalovuziv.pdf
    • http://files.nzplantservices.com/uploads/1/3/0/9/130969772/8864188.pdf
    • http://files.adamkaszycki.com/uploads/1/3/0/7/130776483/195181.pdf
    • http://files.glorytabernacleministries.com/uploads/1/3/1/3/131380596/xiwugumosonetexu.pdf
    • http://files.spitzpsych.com/uploads/1/3/1/4/131406558/sefigeguga.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/define_educational_attainment.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/bumudosibofureto.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/laxororewelegiwapaxeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/xepodofijafafitivam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/75072982294.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/27851467414.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/sunken_temple_wow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/26324573719.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/24103035508.pdf
    • https://cdn.shopify.com/s/files/1/0436/0631/1070/files/35624403671.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/bushcraft_101_portugues.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_off00006192.bin
b3d77b3c27a39c9da0ec585aa432e60574a01413f49dbed62a01180d33bbc002
pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 5644 bytes
font_01_sfnt_off000074f8.bin
1a95eef26ddceb59ccb88490831347fcf7e4a1e07ca824e971b4a9a0bc9e0151
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 10520 bytes