Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a8d6b3799cd925…

MALICIOUS

PDF

34.0 KB Created: 2020-08-01 15:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b08cc1e7e84fe9cab82bd2b43a9fdb SHA-1: cfc7330825d7bbf9c00523c89e713219407a1104 SHA-256: a4a8d6b3799cd92522b38d93af78e9360a03d54ebcd81458f06f725393e41957
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the document's primary purpose is to redirect 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.cc/pify?keyword=cub+cadet+lt1050+manual
    • http://files.woodsrealtygrp.com/uploads/1/3/0/7/130739147/569a2408e.pdf
    • http://files.mrobrien.net/uploads/1/3/1/4/131482916/vakok.pdf
    • http://files.sokoyaprod.com/uploads/1/3/1/3/131379321/tonidadu.pdf
    • http://files.dscollegeconsulting.com/uploads/1/3/1/8/131871585/pabub_fufalutu_vavubo.pdf
    • http://files.womenwhowandertexas.com/uploads/1/3/2/7/132712373/tuniwoxajelak.pdf
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/reweg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3345/files/gawixux.pdf
    • https://cdn.shopify.com/s/files/1/0429/3338/7423/files/convert_mp4_to_wmv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/vowuselowekujogudos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/wabuvajet.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/zudagomokudarise.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/rorokunekepolovadilowam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/pejijogizafodurezex.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/sixikadasawupinadufus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/85913529229.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/34215078898.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4610/files/xabolularaxa.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_off00004776.bin
464de685118fb7900ee34151513aa30db6e60d0b670ab0c2d679f657260ef04b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4776 5176 bytes
font_01_sfnt_off000058fe.bin
646903a647b6c7a1981c986dff2c12046ba3ebd85c3089b260ca4ba9d1d55e1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE 9536 bytes