Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b9cd38e7eef946…

MALICIOUS

PDF

55.8 KB Created: 2020-10-11 02:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eb7b13df05a1da0efa27b1849e8d9461 SHA-1: 7c92e3cd851957a3b134c0a374bb71a983192b2d SHA-256: a9b9cd38e7eef94600d16d24dd9bcca70644b3216c029432ad5b333cad6caf66
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/pify?keyword=vertical+wind+turbine+design+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links. While no scripts were extracted, the presence of malicious links within the document body suggests an attempt to redirect users to harmful content, likely for phishing or malware delivery.

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=vertical+wind+turbine+design+pdf In PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/75771517728.pdfIn PDF document text
    • https://site-1042875.mozfiles.com/files/1042875/tulufu.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/46667637964.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/boragafesopapalojawuvu.pdfIn PDF document text
    • https://site-1041188.mozfiles.com/files/1041188/nuwigedevavumimafir.pdfIn PDF document text
    • http://files.katieuptonhorn.com/uploads/1/3/0/9/130969718/watexodix.pdfIn PDF document text
    • http://files.jerryaylmer.com/uploads/1/3/2/7/132740997/b692d8f.pdfIn PDF document text
    • http://pigozefa.bootjuicejams.com/uploads/1/3/1/6/131637814/tuwikoduwe.pdfIn PDF document text
    • http://files.friendsofthebrookfieldtownhall.com/uploads/1/3/0/9/130969080/c4c8c385358.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/20555569772.pdfIn PDF document text
    • https://site-1038412.mozfiles.com/files/1038412/tubowitakikoliwutikete.pdfIn PDF document text
    • https://site-1042926.mozfiles.com/files/1042926/fizevekadizosi.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/1/0432/7381/4172/files/8x12_picture_frame_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/61489538420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/chula_vista_high_school_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/juzapokiwajakerimagizimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0601/1803/files/nevujodep.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_off0000780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 5520 bytes
SHA-256: 336416f43e5d30999172c9aada91a42f2d5a5f7639e296b9fd3d8ff8c05ea045
font_01_sfnt_off00008ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE8 15736 bytes
SHA-256: 28f95c6ef0100238d3d0d752c7e1f2b8e9b8df561d7fc9971712a4275f29f876
font_02_sfnt_off0000bc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC27 16156 bytes
SHA-256: c4860970343c079c9933586b217a7ae27ea9db6a5279d9e29e3c2ee9eed5149e

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