Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c0942db3bb8656…

MALICIOUS

PDF

41.2 KB Created: 2020-09-03 21:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f8a31bf4549c83880277b145631d19aa SHA-1: 337655dc2f76505fc436f299623005ac39584a66 SHA-256: c5c0942db3bb86562699109791266567ae2503b37af830b32c20ecb87acdb1a3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure to watch a video online. The presence of a malicious redirector URL indicates an attempt to lead the user to a harmful site, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=instagram+video++online+without+url 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/1/0435/8206/2753/files/insurgent_full_movie_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/commerce_township_police_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/89006156867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/86204013296.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_233d63fd43384f64a6583dfb153e8502.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c3ae3_d0e18e03918c46cfbf531bfb51a8f27d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea9bdf_f6617cf081a94b5e85284f95d71688aa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3c460_51b6dc92889d4da788b8fdad21a3f0b4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d8f7d119cd7a4af69d3d0cf4b5e29ad9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_715ef1171c2145999f54f7b4beba0224.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0588d48a38b3407ba93de509ed60e423.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f3216_908d775ad2984e268ff8179c7d3a468f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/18122d_14a6d8834ad44ce493a69f0cc5d98eb6.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_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 5328 bytes
SHA-256: 70fffcbfe98c520d3982b5fc27b270525268823724c66b27d8c6f160a308097d
font_01_sfnt_off0000767a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 9788 bytes
SHA-256: ca2c60fa66328c0faa6c4cb81c4307792bb191047644d22a9af9086f2d05aad1

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