Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34b9e0ed9835ad6…

MALICIOUS

PDF

40.8 KB Created: 2020-10-08 12:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 665ae6819715a114aae5c072ffacc1d8 SHA-1: 9031cd2363c73c00f0d15c07eecd31377f783a49 SHA-256: a34b9e0ed9835ad6160c892c2250b706cb5bf9e0a9c81214ec2edd455fd93306
124 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by an ML classifier and contains numerous embedded links. One link, 'https://gettraff.ru/pify?keyword=capital+letter+cursive+mein', points to a known malicious redirector. The document body is heavily obfuscated, but the presence of many links to disposable domains suggests a link farm or redirection scheme designed to lead users to malicious sites. No scripts were extracted from this sample.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=capital+letter+cursive+mein In PDF document text
    • https://site-1043032.mozfiles.com/files/1043032/76707394585.pdfIn PDF document text
    • https://site-1043705.mozfiles.com/files/1043705/82279178651.pdfIn PDF document text
    • https://site-1040048.mozfiles.com/files/1040048/32445683857.pdfIn PDF document text
    • https://site-1037893.mozfiles.com/files/1037893/nexajavizuvovuvesobiwo.pdfIn PDF document text
    • https://site-1039878.mozfiles.com/files/1039878/65829391355.pdfIn PDF document text
    • https://site-1043941.mozfiles.com/files/1043941/fopoxi.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/48323888143.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/25572226868.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/wirixezopa.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/feforaniwodowumi.pdfIn PDF document text
    • http://files.scrta.net/uploads/1/3/2/7/132740978/livawo.pdfIn PDF document text
    • http://rikolisa.nicolainickson.com/uploads/1/3/0/7/130776247/29ae1b6e0.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/45895723970.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/56184512073.pdfIn PDF document text
    • https://site-1036737.mozfiles.com/files/1036737/getofiparagumixurunelakak.pdfIn PDF document text
    • https://site-1042625.mozfiles.com/files/1042625/80192310418.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 5044 bytes
SHA-256: e5be340d1425f90db7b74d00a78f074d249a4e564419b17ed8e86baf059f57b8
font_01_sfnt_off00007535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7535 9728 bytes
SHA-256: 8ca73ea5390a2d20d83cdfc48a5e4174a8a86eb84be4dfd93192b243488a9e4d

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