Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ac8ed652c685d1b…

MALICIOUS

PDF

47.4 KB Created: 2020-10-02 03:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 95af20ae546b9901843efc30446d6dbc SHA-1: bec63c8ec8f72727524f303566377aeee3c5ad49 SHA-256: 2ac8ed652c685d1babd162a31cd869473c8f026adba4ea64de9b66415db797cd
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.ru/pify?keyword=southpaw+movie+download In PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/46461559429.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/22428220288.pdfIn PDF document text
    • https://site-1038788.mozfiles.com/files/1038788/wemafes.pdfIn PDF document text
    • https://site-1039873.mozfiles.com/files/1039873/60819075873.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/kajakokiwukupebis.pdfIn PDF document text
    • http://files.umhambo.com/uploads/1/3/0/7/130775211/vuvijev.pdfIn PDF document text
    • http://files.mostblessedtrinityacademy.org/uploads/1/3/1/6/131606479/270bf058e2f45e.pdfIn PDF document text
    • http://files.realmilklexington.com/uploads/1/3/0/8/130874360/f5373d5f0ca.pdfIn PDF document text
    • http://zuvebas.stonebridgegc.com/uploads/1/3/0/9/130969140/nuzovawami_powunosututuguj_pomadoz_watiwufoni.pdfIn PDF document text
    • http://files.amastaff.org/uploads/1/3/0/7/130776126/572569.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/1/0432/3039/6574/files/gm_map_sensor_voltage_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9723/8938/files/eyes_are_watching_god_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/55937178269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2877/7630/files/les_pronoms_relatifs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6756 4768 bytes
SHA-256: cce59d00879f1c36c0ef068339ecade144bea60f2452a036bcb1c5a27086c80e
font_01_sfnt_off0000781d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 5180 bytes
SHA-256: 1334f51b57690013abfa35c9c7ca2cae856895379d83dc91efa9ff2a9d438c6b
font_02_sfnt_off000089af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AF 11560 bytes
SHA-256: 382c5989b7e01f5df719cbf70cfa76298a269cd882fd4e8b42f7de5c853ac756