Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e1a921b1be611f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 01:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a85bb3b012da820bc2e8cdf6d6458404 SHA-1: 57075ffa6d1f2b2b5a6f185e3bb42fc5b3078f2d SHA-256: a3e1a921b1be611fb2007f7f0940b727531ede38403d4386a5524fd8ebd4af2b
150 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=agriculture+tax+exempt+form+florida'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise. The presence of numerous external links also aligns with SEO poisoning tactics to increase visibility.

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.cc/pify?keyword=agriculture+tax+exempt+form+florida
    • http://files.tonyquattroville.com.au/uploads/1/3/0/7/130776611/likugosatelimopikar.pdf
    • http://judojun.basiccomputertutoring.com/uploads/1/3/1/3/131398455/tukawuzepomon_tobawozenobe_daneleg.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/75782142016.pdf
    • https://cdn.shopify.com/s/files/1/0432/2371/1903/files/vezajafadokaxofit.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/foxtel_go_android_app.pdf
    • https://cdn.shopify.com/s/files/1/0439/4044/6366/files/ischemic_heart_disease_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4510/files/kokalevaritetobavezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/besebotulabedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/fukubizatof.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8458/files/basic_spoken_english.pdf
    • https://cdn.shopify.com/s/files/1/0449/2325/6999/files/73283836105.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_off00005b67.bin
7d1e37102f934e4b6cbac4bf1e9f64125c05b3b6cda0dbe8d91ebd67e58cb1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B67 5356 bytes
font_01_sfnt_off00006d8b.bin
603c70b458a7bbf766426733881ba76098302829bd517cbbc0d6483f0ffceb62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8B 13904 bytes

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