Malicious PDF — malware analysis report

Static analysis result for SHA-256 493a449bfcd5f448…

MALICIOUS

PDF

63.2 KB Created: 2020-08-17 16:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a7ba93757c227f11c00976146a7802 SHA-1: c07db05df761ebf073d66091f9030200d80d378b SHA-256: 493a449bfcd5f448a76a1580e77979a2596fce5cbe2e21b266b76f80d3d5ded6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=directors+remuneration+report+regulations+2002'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0430/5348/2138/files/kesoladav.pdf'. The document body, though partially corrupted, contains text related to 'Directors remuneration report regulations 2002' and the wkhtmltopdf application, suggesting a lure to disguise the malicious link.

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=directors+remuneration+report+regulations+2002
    • http://files.minnesotahistorymuseums.org/uploads/1/3/1/6/131606125/230d48.pdf
    • http://files.sandcastletreasures.com/uploads/1/3/0/7/130739918/952efea14f99d.pdf
    • http://files.kpwoodenstone.com/uploads/1/3/1/4/131437380/9d18c6b169badd.pdf
    • http://files.pvgsb.com/uploads/1/3/1/3/131384636/vulurunezaw-bogutonixawon.pdf
    • http://files.reading2reading.com/uploads/1/3/0/9/130969555/49253ecafb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/kesoladav.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/sims_3_baby_clothes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5842/files/79710966100.pdf
    • https://cdn.shopify.com/s/files/1/0447/9261/0977/files/seruzepefukosezozin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/leed_green_associate_v4_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/27670357756.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/xa_trang_file_trc_tuyn.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/90075049596.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_off0000baf9.bin
3ae4a7a4c28441ffd3c184b258cb296d7952cc10d662e5a3e329b079b2536d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF9 5528 bytes
font_01_sfnt_off0000cda9.bin
f66630af87963528ef53bb78fc0b4a1df2faa82b46bcf5915b2f2aa820aedf52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA9 9884 bytes

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