Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1cc8e4872fe218…

MALICIOUS

PDF

45.7 KB Created: 2020-10-11 00:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ccf5bb429e9b68691df71b380c3e8827 SHA-1: f5e6adf41c28043d3cfa2e940bf8fb7ca9adc850 SHA-256: 1f1cc8e4872fe21825e91dc6a8c3f4b284bd170a5f4f9733f83464a500896547
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, supporting the presence of malicious redirector links.

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://ggtraff.ru/pify?keyword=harry+potter+uno+9+3%252F4+card In PDF document text
    • http://files.shinyobjectsvintage.com/uploads/1/3/1/6/131637553/38b1a0de.pdfIn PDF document text
    • http://sijilepi.briana-jenae.com/uploads/1/3/0/9/130969458/6229065.pdfIn PDF document text
    • http://fopag.dancebykris.com/uploads/1/3/0/8/130874320/depisip.pdfIn PDF document text
    • http://vavadoto.funprintablesforkids.com/uploads/1/3/2/6/132696198/nodis.pdfIn PDF document text
    • http://files.minidayz-mobile.com/uploads/1/3/0/8/130873810/ca3d435e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/be359342-e8d7-41f4-9d8a-19a8442fad88/43060218710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323d9580-edb0-4f13-8d4e-4eb72e427450/gimoxelavobaregasibabivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c19ef3c-1b56-4214-816e-eaa1314f4451/zedefemuwujov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795bcb1b-d35e-48ab-b331-ec54c93d4438/57250537119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adbc125b-dd98-40ab-9ce3-1866ac2cb1ef/vebuxujugewawonegot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0242/9092/files/vezudirasojedikolar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/gijilekudarijitipimexerel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7731/0366/files/cleric_magic_items_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/44874639401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9023/5558/files/substitute_for_marsala_wine_in_zabaglione.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5190/9274/files/jitidegokim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8559/7346/files/13601140105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2204/7656/files/sikepusujigunivaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/joker_dvd_release_date_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8595/4208/files/fulltone_deja_vibe_manual.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_off0000742e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742E 5364 bytes
SHA-256: e50516301f1a32bca7d5b3585793ee474973a9c256f9c10725731dafda06f78e
font_01_sfnt_off0000868d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868D 10352 bytes
SHA-256: 12b6b198529e62e71bcd783cb934ba05b7ce34ca26eefad0ec2ab9a0960745f7

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