Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3201f3a40184d14…

MALICIOUS

PDF

65.1 KB Created: 2020-07-14 20:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d22831c2ce1ef0fdfb017e79655fb3 SHA-1: 8eddb83696ef848446ce3a55d4e7ea6d950e9665 SHA-256: f3201f3a40184d14d80eb3a469712464d1fbbad9f283f0c3b7d9f775424dd63e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL that appears to be a lure for downloading a 'business analysis' PDF. Additionally, the PDF exhibits characteristics of an SEO link farm, embedding numerous external links, many of which point to other PDFs hosted on similar domains. The ML classifier strongly supports the malicious nature of this document. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/wb?keyword=business%20analysis%20for%20dummies%20free%20pdf%20download
    • http://files.millbrookrotarydirectory.com/uploads/1/3/0/7/130775846/d99ea.pdf
    • http://files.thecenterforhopeif.com/uploads/1/3/2/6/132696621/7637173.pdf
    • http://files.gatewaylegacyprep.com/uploads/1/3/1/6/131636984/b39f823c46.pdf
    • http://files.higracecentral.org/uploads/1/3/1/4/131453984/525632.pdf
    • http://files.rotaryseymour.org/uploads/1/3/1/6/131637631/7370516.pdf
    • http://files.joyfulnoisepreschoolsandy.com/uploads/1/3/0/8/130813768/595cf7d.pdf
    • https://gopixur221482700.f
    • https://vonadezosul499015480.files.wordpress.com/2020/07/wikorubopasenapi.pdf
    • https://gopixur221482700.files.wordpress.com/2020/06/15327285612.pdf
    • https://tixenijufo.files.wordpress.com/2020/07/14938163419.pdf
    • https://pawezadote.files.wordpress.com/2020/07/lunezazetiwebukosikujimev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98048873934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7518/files/xorit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/10681178196.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/68586047765.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/41784297803.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/voredukajapanujulagivob.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/79943735201.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/nipaperifuzabuvixi.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_off0000c179.bin
a6342f9b97ba010493a3a39f2e86dff1e8ce55e23a9a0b68f424918b4d2b48c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC179 5232 bytes
font_01_sfnt_off0000d337.bin
ec80ffe42d7f6c9c82ee1d3e846cf8455371efe5bd0556092521252a56dac64a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD337 10264 bytes