Malicious PDF — malware analysis report

Static analysis result for SHA-256 f405bf8b1e10cbf1…

MALICIOUS

PDF

46.0 KB Created: 2020-08-25 19:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 09c617f62fc15ff8e81b37443a23a9fb SHA-1: b7a91c6674acca8737792dc5a08dcafb585ebb19 SHA-256: f405bf8b1e10cbf1d88f1f6541a7cbb7e38f66fe82f84c6e75bb79b3e7fea9c9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.club/pify?keyword=risk+of+rain+2+unlock+all+items In PDF document text
    • http://jujopa.intrinsictheatrecompany.com/uploads/1/3/0/7/130739590/6778859.pdfIn PDF document text
    • http://files.bethinkcreate.com/uploads/1/3/2/7/132740218/70bd1ff781.pdfIn PDF document text
    • http://files.allfloridapaint.com/uploads/1/3/1/6/131606343/wulebipimux_lapexudojo_josuxerulozope.pdfIn PDF document text
    • http://files.gatewaybiblebaptistchurch.ca/uploads/1/3/0/7/130740323/jonuvuwuvenegiru.pdfIn PDF document text
    • http://zilepi.buyonlinesui.com/uploads/1/3/0/8/130874376/9523149.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/1/0431/8671/6830/files/66521182960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/arrest_warrant_case_icj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/10403107110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/biology_textbook_grade_10_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/cant_hear_anyone_on_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1951/6579/files/78481397433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/bekavixevivokugamuxizej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/seventh_day_adventist_bible_commentary_vol_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5648/0935/files/47104502677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/wufosixatomivedenowaniwon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/gukevowedenut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/bootstrap_3_glyphicons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6813/0208/files/92628771051.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_off000074d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D0 5228 bytes
SHA-256: f566d7bcdd5758d2f589edbdd4098728c13ca491e15a6b420a4e3752f0838b3d
font_01_sfnt_off00008681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8681 10644 bytes
SHA-256: a47dfd19f486527e51d71e3bd5a2fc75cd0c4d94b1ae48024d8a761fe1b3a8aa