Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7d5dfd73cb6d43…

MALICIOUS

PDF

43.5 KB Created: 2020-09-19 02:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1d49d5383779c749a5ce397b5afa778d SHA-1: 2bc3a594bbacc0414416a1d59a6bb233977c178e SHA-256: cf7d5dfd73cb6d4345ce304ca565b59dc66073faf6ac8376fa313c288004342b
154 Risk Score

Malware Insights

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

The PDF contains a lure related to "Fifty Shades Freed Parents Guide" and embeds multiple links, one of which is identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The presence of embedded URLs and the nature of the heuristic firings suggest this document is designed to redirect users to malicious content, likely as part of a phishing or scam campaign.

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=fifty+shades+freed+parents+guide 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/1/0486/5490/9608/files/daniel_defoe_robinson_crusoe_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/40334906938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/misevixunupojimarapiviben.pdfIn PDF document text
    • https://e172543a-442d-4437-b255-ef01b33f5afc.filesusr.com/ugd/1e52da_13e7fb689f044f09a679419633bbc8ce.pdf?index=trueIn PDF document text
    • https://e440b78b-a050-473f-9360-e032dc2c25b0.filesusr.com/ugd/f09a9d_744c32e3a1504bd9aaa7ff5a85afe5ba.pdf?index=trueIn PDF document text
    • https://560535e6-3980-4a8f-bd55-772296553591.filesusr.com/ugd/3a38e0_0ace9de55c294d299a1faa4744541e43.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/pusezexebebisigid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/jeroliron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/zorewovuvolavijixejuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/human_factors_in_automotive_engineering_and_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/19111215198.pdfIn PDF document text
    • https://56192103-4c50-4cd6-813a-95e9e7722490.filesusr.com/ugd/bd1fc0_9f25fc084e1f4b109c71c40bb49d01f1.pdf?index=trueIn PDF document text
    • https://2fad22e5-a707-4a39-a2f9-2b71f1b36033.filesusr.com/ugd/7ab50f_8c0188da7d3d440b823887efb06099f8.pdf?index=trueIn 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_off000069fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FB 5328 bytes
SHA-256: 2329c41ac7e118d4a4da1038bf4e03b96c390128e9d02905e39a4a6188b51a37
font_01_sfnt_off00007c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 11160 bytes
SHA-256: d727e3faa2296996bc5d9e3533797f433ffc8dc05c5ea52dd638b6c37582d8f5

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