Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9f37f87e9b629a…

MALICIOUS

PDF

36.4 KB Created: 2020-09-06 21:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 76b4a925b416d30251c14028233f744d SHA-1: 3048f666e0c943dca8ff3de6897ce3266a28ff4d SHA-256: 8c9f37f87e9b629a85ed107b5c8db056c3fe3fd528a7582cd4a5854f8b216c01
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.link/wix?keyword=ajooba+full+movie+hd', is flagged as a malicious redirector. The document body also contains this URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly indicates maliciousness, and the presence of multiple external links points towards an attempt to redirect the user to malicious infrastructure.

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.link/wix?keyword=ajooba+full+movie+hd In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/jexibogodox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/cpr_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/gokogisirebuxezajogorajo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/92ee2b_88ae045a092945e1ba247fe4cc43ab3a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de60da_8e574bb54d5b4748a079b0300c289631.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bdeb4c_63ed93716fba4a0a80ac164fd8de4713.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/409ca8_0d88c3a445f241c6a947f3d47a307dbb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97aff7_20ce786d32f14b4b9b189c5e95959ff9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de02f3_300166684b484400bc64e475b4a0dd76.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3d0627_2cd02470d0664b7ba1ea4b3ed8a690d6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6173/9419/files/8325681324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/wawazuxovadubutomajojope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/zezevimepinodika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7352/8223/files/14800024513.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC2 5136 bytes
SHA-256: 84650c7bcbaf2e49a66ea8c8de1906963f2ff38a7deae8bb98921e53c084752b
font_01_sfnt_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 10600 bytes
SHA-256: dcae5d54e1323e81e8086e942ca3ab3d00b53ee7057f9c1aef591e68fd336933

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