Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae2aa62ce1ac0c1…

MALICIOUS

PDF

67.0 KB Created: 2020-10-27 03:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b28814fb9c487f30f99f324eda5ffab9 SHA-1: c01aa3ab8a3d0db6a370736a4e1c32868cccde6f SHA-256: 9ae2aa62ce1ac0c136c764b6dfb1eec26b6773952db7025def12a41482f676ba
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.link/123?keyword=skyrim+redguard+woman+names In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f93db632ed69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8a7200afabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f91c418550a3.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/2441207.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/da56f9b3f00fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000aeef.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000aeef.bin)
    • https://s3.amazonaws.com/muvojugejoxip/sizeluputapamumexakunu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/suragu.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/pulusavifekagigoxabije.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/puribebixizoxabibogeta.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/aplastik_anemi_nedir.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/risk_management_in_banks_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/biochemistry_textbook_berg.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/7693589077.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/clinical_anaesthesia_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/46991002731.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/67205658525.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/tajupitujo.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/wodilokajefilisabomoxanig.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/aerosmith_cryin_guitar_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/kiketipugojege.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/56574883556.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 extracted file (font_00_sfnt_off0000aeef.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000e8b6.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000e8b6.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEF 5472 bytes
SHA-256: 6ca578c695bed7212b8eb1c1f338cd29530ad780357020bb340a1c080750fd31
font_01_sfnt_off0000c189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC189 11524 bytes
SHA-256: dd82d9bab5dcfc4905af7d7b2671c98b06a39e8ba3cb347178aa37ca0e8da41f
font_02_sfnt_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 16296 bytes
SHA-256: 8209c5fc27800dad91b79bdc1d2542939faa66d1b2f519a8f9f1b913071849a2