Malicious PDF — malware analysis report

Static analysis result for SHA-256 826f99843986ab8c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-05 11:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c1a6f9bb537bbaaf59a27cc20183070 SHA-1: 0f54af1d5934c72c00d72710008fa143fadbf929 SHA-256: 826f99843986ab8c321facfd95c76910ff14903f712eaa502d99e6ab04144291
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one primary link redirects to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Bhagavad gita chapter 14 slokas in english pdf' and the malicious redirector URL, suggesting a lure to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=bhagavad+gita+chapter+14+slokas+in+english+pdf
    • http://files.glynisfullwood.com/uploads/1/3/1/4/131409884/resofogoga-rosino-bojew-nukanamoxoga.pdf
    • http://files.oceancountyroofing.org/uploads/1/3/1/4/131437249/20822a9e70d6f.pdf
    • http://files.singaporepsychic.com/uploads/1/3/1/4/131438464/5072537.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0183/9769/files/74447820311.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/jozirevizurupokolixukoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/lonoluluwowar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/riesgo_cardiovascular_aha.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/lokedejumigulikajarub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/18613231307.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/54750882005.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/ligogipunodojuzekatatutow.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/rosapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1297/9869/files/67669773683.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/meruwesuwada.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/vefelosegizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/suwegijefupefaberukiram.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006196.bin
004cf2cd3f8107b02e5297f157950bffa2cd94acfe1295ebea45e97ab5143c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 5732 bytes
font_01_sfnt_off0000752f.bin
840db6f468d9342d46d2594dbb818cc65b72d62d606bae79336edab8eaf8c610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 13616 bytes

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