Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e83d202cffa46f4…

MALICIOUS

PDF

34.5 KB Created: 2020-09-16 05:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36c22e67a212bb5d8ef7b5bda535f805 SHA-1: 27f21c7a73e30291c2aef1b9b7ed932ef8568ab6 SHA-256: 3e83d202cffa46f44deb2b413afa1256b61586f6babe8572c6ce29e468e9a9a6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though partially corrupted, includes the URL 'https://ttraff.link/pify?keyword=walk+don%2527t+run+guitar+tabs', suggesting a lure to external content. The presence of a large number of external PDF links, identified as a link farm, further supports the malicious intent of directing users to potentially harmful sites.

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/pify?keyword=walk+don%2527t+run+guitar+tabs In PDF document text
    • http://xagase.sacredstonesministries.org/uploads/1/3/2/6/132695643/pomavezalotofiw.pdfIn PDF document text
    • http://files.stjohnsstafford.org/uploads/1/3/0/7/130775850/jewajivozarujevumog.pdfIn PDF document text
    • http://files.nadjalitau-photography.com/uploads/1/3/0/7/130775866/5162086.pdfIn PDF document text
    • http://files.aftonhistoricalsociety.org/uploads/1/3/1/4/131454238/kotizun.pdfIn PDF document text
    • http://voxufo.southerncare.co.uk/uploads/1/3/2/8/132815986/df86f5e0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1318525437d04026a36bb8fd533469f4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/54bec1_abdc156d43064258af22e60f1aea4829.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6520f5d14ed244a8b758c44845067024.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/851c7c_9ac2ceabdf424283acfbeded5dca4265.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e9d795a3549d41608b705ae0f41ce733.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bc79a4_cc55e7dc00c440afbc04274bc111429b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/405339_c136d999a78142fc9e720a5dcbdf0977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/wojunebixuneduzavakif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/15598458197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/modibovobibiwuzokeroruveb.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_off00004539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4539 5244 bytes
SHA-256: 52c3028c6e8f1152e0f6f79da7e6d1df4372a836ff27d2e37ca223f395646b3a
font_01_sfnt_off0000572e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x572E 11352 bytes
SHA-256: beabfeb04a6feab3cd05a53904179f774d0bced288d8574742d0d9a938ef248e

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