Malicious PDF — malware analysis report

Static analysis result for SHA-256 929d4f7c89062c7d…

MALICIOUS

PDF

43.6 KB Created: 2020-10-10 12:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: db6f8327cc8188b76708a7537c6fb789 SHA-1: 6746bd07eae7045f57add942f204615b58e5b4b6 SHA-256: 929d4f7c89062c7de425dd1c60269ddbf49203ff61770915e3b4a30fb18e81c3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself contains obfuscated text and a URL that further reinforces the malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely as part of a phishing or malware distribution 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://gettraff.ru/pify?keyword=preemie+baby+clothes+weight In PDF document text
    • http://woboti.salinakennelclub.com/uploads/1/3/0/8/130874388/zawokulura.pdfIn PDF document text
    • http://files.mro-plus.com/uploads/1/3/1/0/131069886/50fb018274e8.pdfIn PDF document text
    • http://files.bearvalleykidscamp.com/uploads/1/3/0/7/130740018/kisokuf-sevevimafujum-gisigiv.pdfIn PDF document text
    • http://files.reversewordlookup.com/uploads/1/3/1/4/131438443/8734438.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/nunamexalilokoton.pdfIn PDF document text
    • https://site-1040347.mozfiles.com/files/1040347/jotazasujumanofomogaji.pdfIn PDF document text
    • https://site-1043408.mozfiles.com/files/1043408/90078966087.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/1/0481/5460/7769/files/industrial_location_assignment_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2535/7210/files/47824213673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3637/1863/files/2010_honda_accord_crosstour_headlights.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6656/4254/files/17243943840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/why_buildings_fall_down_book_review.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_off0000685d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685D 5548 bytes
SHA-256: 119d060df4edcd9e50735caec51d291674f5360db0b960a717fb6930276ab855
font_01_sfnt_off00007b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B23 10828 bytes
SHA-256: f5903aa0ec1d0c16a3e37a57224f955b33cd589aa1abdd205f84ed383939c5ef

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