Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27a408b4f312a34…

MALICIOUS

PDF

39.0 KB Created: 2020-08-17 01:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5d7624f35e2b889a538d37e2ec61f5f SHA-1: 43b972973362ccc89c07b85ba24f0eb752d789d0 SHA-256: a27a408b4f312a340ab07883ec41e86e9804519d2d5f8e9a5329f297b8831a6f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The document body, though heavily obfuscated, contains text related to 'Tv broadcast package after effects template' and includes the primary malicious URL, suggesting a lure to download potentially malicious content or be redirected to a phishing site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=tv+broadcast+package+after+effects+template
    • http://nopaka.syedholdingsllc.com/uploads/1/3/0/8/130814328/6076e7cd.pdf
    • http://voxab.mercglobal.org/uploads/1/3/1/4/131408024/pegezelire_vitufarolavosi.pdf
    • http://files.deletealcohol.co.uk/uploads/1/3/1/1/131164460/rireviliz-sogaded-robobubelisizim-ranikaxupaluj.pdf
    • http://bixokijuv.meadowbrookwellness.com/uploads/1/3/1/4/131409090/kivajevapuputineke.pdf
    • http://valifuba.aperfectinjustice.org/uploads/1/3/0/8/130814124/jajoviz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/wikekebakivezilezabotuxen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/baropanoxuzeme.pdf
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/first_reformed_church_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8279/files/harry_potter_bloomsbury.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/18398754993.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/tonageloduralixef.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/wisamixelugawopoboko.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/58882928166.pdf
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/ebola_virus_infection.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/csv_to_json_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/tewop.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_off000059a6.bin
7a5396b90b1de34f2752ba3c6eb6041cea7dfbb8ea19cee45d142e71fe5e9a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A6 5688 bytes
font_01_sfnt_off00006cef.bin
c248fd58b49ac8f1c586cc5b11101df96ac5d0729cd44ab3a0eb91e357dbed66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEF 9968 bytes

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