Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8fb811722ab61c…

MALICIOUS

PDF

40.0 KB Created: 2020-09-20 23:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21cac77f5cf18a62e232a3fc68016261 SHA-1: 664a9282da9a411810eca83a886bcc467929e984 SHA-256: 0e8fb811722ab61cfcbe75bca429c97d6f9dab63db0ebae96dd5b9e7f0bd2538
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that appear to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary malicious URL identified is https://ttraff.club/wix?keyword=molly%2527s+story+a+dog%2527s+purpose+novel+pdf.

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.club/wix?keyword=molly%2527s+story+a+dog%2527s+purpose+novel+pdf
    • http://dukamozot.shadhickmanrhs.com/uploads/1/3/0/7/130739906/5326935.pdf
    • http://files.hyperionshand.com/uploads/1/3/1/6/131606313/neligubu-tagud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c4137a97-0c3f-47e5-80d1-b68931e3897e.filesusr.com/ugd/efb3f0_3030e01f6039499da4cf5652ceb3d3d3.pdf?index=true
    • https://d89bb215-0da0-4b2d-98fd-68f142fe363e.filesusr.com/ugd/2b25e8_c224f34b83a74e53acd489652e007750.pdf?index=true
    • https://ee792370-a14c-49c4-a0c8-2a72ee37b520.filesusr.com/ugd/4dd980_52ea482b58374ada86a803d0db8925e4.pdf?index=true
    • https://3d201b7d-2a5a-4ad5-bf39-15f9c4f46091.filesusr.com/ugd/21e6f2_c12b6e7d9c734687ab1f5b14cd6941cd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0482/9891/8050/files/existential-phenomenological_perspectives_in_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/fitted_top_sheet_twin_xl.pdf
    • https://cdn.shopify.com/s/files/1/0432/2043/5112/files/losetewuk.pdf
    • https://cba23d9f-93f6-4a7a-92c3-c4cb8a3e8d70.filesusr.com/ugd/89602e_c27b72734ab3458b8978ca2776c1aed7.pdf?index=true
    • https://c845984e-934c-4dd7-937c-77ea6ca3ca6c.filesusr.com/ugd/a0d21a_93a07da40323442f8f8d3c018b35363f.pdf?index=true
    • https://fda12920-201f-4296-8c57-297d9469e1a3.filesusr.com/ugd/2c76f4_0c87d216d6f549f782987cb4c5d7796f.pdf?index=true
    • 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_off00005376.bin
ede4b19c86eb7e48aa53fcd2cec96caf85ef5a256f799f66d8011f350857fb4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5376 5408 bytes
font_01_sfnt_off0000660e.bin
914e62e4e64124f4ffbd89dcd36d1ac28e53161612ccd1a1de37153ccbe792c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 14216 bytes

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