Malicious PDF — malware analysis report

Static analysis result for SHA-256 95628cd072137b66…

MALICIOUS

PDF

48.8 KB Created: 2020-08-08 17:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 883369a7db6d165db35db903fd52e27a SHA-1: 310c313588995262e1bf66b8d984c249c5212bbb SHA-256: 95628cd072137b6605f9d64c6ec13a3ec3e8e3b1754d32ba1c9884aa97b786f6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect 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.cc/pify?keyword=adenoidectomia+tecnica+quirurgica+pdf In PDF document text
    • http://files.kyobradio913.com/uploads/1/3/0/7/130739949/5983364.pdfIn PDF document text
    • http://gikanir.montevistachamber.org/uploads/1/3/0/7/130775027/xonolarimiba.pdfIn PDF document text
    • http://files.lingpuisze.com/uploads/1/3/1/6/131606165/4296724.pdfIn 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/1/0432/4166/8775/files/narezobade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/breastfeeding_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/mafexuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/3322164116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/12957108542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/21294544918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/84741384091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/tufevega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0663/1833/files/mastering_elliott_wave_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3005/2007/files/bliss_lectures_on_the_calculus_of_variations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5060/6497/files/dopize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/vumigivamufun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/11374572241.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7A 5380 bytes
SHA-256: 76107885c24bfec5d8d2cc39813630cf8880e241acd29856844d133cc99176b3
font_01_sfnt_off00007ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA9 10460 bytes
SHA-256: 2df0d9d11ef639b88b15d3018f00d8402702d7797f88a12bbde1156fb374f5eb
font_02_sfnt_off0000a08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA08C 16112 bytes
SHA-256: d84fd1259e31a5fcfa02941eda5e1e93b8bc7c2f0c9f631c7f87bf3cf9b0ac97

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