Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b6a35bf59143f9…

MALICIOUS

PDF

47.4 KB Created: 2020-08-24 20:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f79da269aa3ffa39b030ed453d68e9 SHA-1: b61847663c7cdcf32d1df3e4707ce5b77dd4d12f SHA-256: 69b6a35bf59143f9514c2e948eda705c9fbe387bd3becff0cfc77141cdf29ae1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive lure related to university admission forms, designed to trick users into clicking embedded links. One of these links, 'https://ttraff.cc/pify?keyword=makerere+university+admission+forms+2019', is identified as a malicious redirector. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=makerere+university+admission+forms+2019
    • http://files.maxiesknitwear.com/uploads/1/3/2/6/132682676/vuwarunofulofewowo.pdf
    • http://files.helensofaer.com/uploads/1/3/0/8/130874385/2524771.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/91756215768.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/zewurukem.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/xuzugatidojol.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/finodonafepafigok.pdf
    • https://cdn.shopify.com/s/files/1/0434/9414/6200/files/rotary_actuators.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/change_text_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/31464109792.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/wefalogugi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/jurnal_tentang_boraks_dan_formalin.pdf
    • https://cdn.shopify.com/s/files/1/0436/2190/8640/files/2025454399.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/70839837866.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/12692300960.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c7.bin
ad1a503ab2d09736f5e2bb788a317a36933535f407088c33d7ac716c1d642f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 5732 bytes
font_01_sfnt_off0000764c.bin
372cee3ec4bb5b433c8d002de95d12919232d2809baeba8f3295debadeb8190c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 10856 bytes
font_02_sfnt_off00009b2a.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2A 16204 bytes

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