Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f16e8f88893a54…

MALICIOUS

PDF

35.3 KB Created: 2020-07-09 08:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b223dc90f72389a43db2df109900e04c SHA-1: 6ef06f4d834fc69e547de05d862cb08cca6241be SHA-256: 66f16e8f88893a5453f15955354acb7e3d002a9d055cd5985847d6bf7197b750
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with the primary link directing to a known malicious redirector. The document body itself is heavily obfuscated but contains references to the same URLs. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for SEO spam or phishing purposes.

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/wb?keyword=greater%20kashmir%20e%20paper%20pdf
    • http://files.theinsurancecorners.com/uploads/1/3/1/8/131871651/loxaxapebugo.pdf
    • http://files.farhillaussiedoodles.com/uploads/1/3/1/4/131454670/98e3532721.pdf
    • http://files.sportseconomics.org/uploads/1/3/2/3/132302966/8686491.pdf
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdf
    • http://files.pomfpanda.com/uploads/1/3/0/9/130969758/2005003.pdf
    • http://files.elitegymsamui.com/uploads/1/3/2/6/132695836/zeleredo_totaramabijipi_xaporusikije.pdf
    • http://files.euccommunity.com/uploads/1/3/1/3/131381839/jadum_futolono_dugelarujine.pdf
    • http://files.ejpendergraft.com/uploads/1/3/0/8/130813305/3002a8adcaf.pdf
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fivulenis.files.wordpress.com/2020/06/dutozamol.pdf
    • https://visazuk.files.wordpress.com/2020/06/nijugalexedu.pdf
    • https://zunizavuj.files.wordpress.com/2020/06/gifoputobiretaveziloki.pdf
    • https://mowawosubi.files.wordpress.com/2020/07/95764742909.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.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_off00004dad.bin
3b79a4eb94ba1ae7589dd31a5be693f39df024a5cf111291014675444a86e325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAD 4916 bytes
font_01_sfnt_off00005e6b.bin
4197da21bf246cc1fc606a76e362f7629297d958de4c66f759e6f064d74ccd21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 10356 bytes

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