Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa330ba16cb62762…

MALICIOUS

PDF

48.9 KB Created: 2020-10-27 15:08:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4fdef92c592f61dd0f5b99d6cc040bd8 SHA-1: 382768d2c278ca02f24948fbb7fb2c0502a15199 SHA-256: aa330ba16cb6276235ccd2ffa0550dcdd03d09dbfd45ba267c3f8cd138c4a566
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external resources, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, directing users to 'gettraff.ru' with a keyword suggesting a technical document. This indicates an attempt to manipulate search engine results or lure users to a malicious site.

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/wb?keyword=petroleum%20refinery%20engineering%20by%20nelson%20pdf In PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/kidimapenalolo.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/e4a952ebb45e20.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/kamirid.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/zukakakojufo.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/tuwusadovafozap_tivikubowexuwel_tajegogar.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/tadodinad-nakiwovukil-tumuset-lomifatolumim.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/berufa.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/1/0500/0033/0911/files/workout_guide_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7113/6440/files/goodwe_inverter_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1622/2406/files/lecon_anglais_debutant.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/occupational_health_and_safety_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/etymological_dictionary_of_modern_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/belakinunalirexabo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/the_old_man_and_the_sea_novel_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zufuxusedefuxagezexexux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d69f56-b0a1-4a04-addb-005cb6e6f447/spring_break_canada_2020_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b88fb81-22ee-4fd6-8fa8-10e5f50184d4/rosufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7130/2553/files/19184314083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2315/7416/files/2020_suzuki_gsxr_600_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1845/5706/files/vawubadedunimufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4400/2714/files/laxujulavevurofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9703/3366/files/goat_simulator_payday_trophy_guide.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_off00007f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F19 5396 bytes
SHA-256: d1479bb026f85341bd089478ae5e9d4cdad1a74ae3121559aeac2956c9cb6241
font_01_sfnt_off0000915c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915C 10852 bytes
SHA-256: 960838a49eff4ccba8dcb1b155ec187e9419583ff2426827e34ffdce50fb54d9

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