Malicious PDF — malware analysis report

Static analysis result for SHA-256 9639b2a77be0a006…

MALICIOUS

PDF

120.4 KB Created: 2020-11-19 09:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c54ccfbca0151c5694b3dc51b99d6921 SHA-1: ec758b625b062cc6f6f6f4c0db5baab2b2aacea4 SHA-256: 9639b2a77be0a0068f74f5ecf13d6109f24a547324c217a5a8796b0adad90e3b
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically identified as a malicious link farm and an SEO phishing lure. The primary redirector URL, 'https://ggtraff.ru/aws?utm_term=article+2+philippine+constitution+pdf', is flagged as malicious. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/aws?utm_term=article+2+philippine+constitution+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fa3ea672d71e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f9dce295baee.pdfIn PDF document text
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/timixijalefewobuwo.pdfIn PDF document text
    • https://jumemovelavubar.weebly.com/uploads/1/3/4/5/134516611/0d1fad82812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_5fae5b07d1e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_5fa484d9c8086.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fasanag/17911148380.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/vehicular_manslaughter_nv.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/99843320907.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/9441947084.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/papewazikozo.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/images_of_the_libra_zodiac_symbol.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17734 5036 bytes
SHA-256: cd04681ad6f2225a09cea509dfc8bb67d2b1c77fee9db5f3ffd1fab37b02b14e
font_01_sfnt_off00018847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18847 13028 bytes
SHA-256: 29a71eb11a5e072c80b43e2f41650f337b5e08836f3448141dd180288544f31d
font_02_sfnt_off0001b12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B12D 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc
font_03_sfnt_off0001c5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5C5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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