Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7757fe1f688ab3…

MALICIOUS

PDF

42.9 KB Created: 2020-08-02 17:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dce749b91b9e666b72b132fe5cab273 SHA-1: c54ea94f8b79fe18e7560dab577d89e75e71bacd SHA-256: 2b7757fe1f688ab3feb2fdedc6735b8a2a8555deefac97c03ae961da2081c517
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Conceptual physics 10th edition pdf'. This link points to 'ttraff.com', which is flagged as a malicious redirector. The document also features a visual download button lure, reinforcing the deceptive nature of the link. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination.

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=conceptual+physics+10th+edition+pdf
    • http://files.debbiecordeiro.com/uploads/1/3/1/4/131437722/8856459.pdf
    • http://files.standrewskentct.org/uploads/1/3/1/3/131384401/ad1a68a.pdf
    • http://files.retrogamergear.com/uploads/1/3/1/1/131164239/8049275.pdf
    • http://files.beholdvisiodivina.com/uploads/1/3/1/8/131871814/ridavugemega.pdf
    • http://files.eurekailchurchofchrist.com/uploads/1/3/2/6/132682851/5399895.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/xesigukodezimarotulatag.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/pukifotajozevevuvolalexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8744/files/what_does_unbreaking_do_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1056/files/nedonarazuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/lurejimidomorifef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/rezukijofowuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/62631644273.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/busum.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/muzukolup.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/merenojofoturewugigov.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/14684548406.pdf
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/25700387219.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/23428184323.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_off00006851.bin
021fc4e6e9a2d7ede5f96617097526322db15fbcd3db6b3da4d823ab03daa553
pdf-font-stream PDF embedded font (sfnt) at offset 0x6851 5348 bytes
font_01_sfnt_off00007a8b.bin
34bd872c47410d9d43b330ef6fbea51f94f5d9e1b658c15609a691657764b5fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8B 10792 bytes