Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f8c16b9ddf0e45…

MALICIOUS

PDF

74.6 KB Created: 2020-11-22 02:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1a409228099a98e06b5b7e2569678503 SHA-1: 553de037075065c50c917b09c7beaf2b01d09b96 SHA-256: c9f8c16b9ddf0e456e99337267d90197a75eca0349229bdc3ab678d893ce719a
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector and part of a link farm, designed to lead users to malicious sites. The embedded URL 'https://gettraff.ru/123?utm_term=db2+sqlcode%253D-407+sqlstate%253D23502+sqlerrmc%253D%252An' is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=db2+sqlcode%253D-407+sqlstate%253D23502+sqlerrmc%253D%252An In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_5fb8331db4c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f9683139ec5e.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/11934861911.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/a1e331659ab.pdfIn PDF document text
    • https://pivakezajategag.weebly.com/uploads/1/3/4/6/134605748/xikujanofajojof_bojemilebalo_doxokixigiwez_vikid.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/xagitelavezar-rumizivevije.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/bogokuvudubidag.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/erik_satie_gymnopedie_2_piano_sheet_music.pdfIn PDF document text
    • https://woruvewuz.weebly.com/uploads/1/3/4/4/134400058/tigejafuwus.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/ohsaa_football_rankings_2019.pdfIn PDF document text
    • https://kutesavakelex.weebly.com/uploads/1/3/4/3/134336058/c894ef049ad.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/9009cbab-1909-4b66-af8c-b4c871be0abb/supemixikemomevapi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDC 6228 bytes
SHA-256: c7739280241cb872d19250806ff9f171db8e1894f8dda08fa355da4280ea6948
font_01_sfnt_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 11460 bytes
SHA-256: 8fe4bfb0133169a8a83eec92549d3e8ef72338979c0045388048952ab5b8893c
font_02_sfnt_off00010853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10853 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550