Malicious PDF — malware analysis report

Static analysis result for SHA-256 43636f420f8af42e…

MALICIOUS

PDF

177.4 KB Created: 2020-11-20 09:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 75501d12407b7794bd0a38473d606dd9 SHA-1: 140fd43c6dd73cdf55d051af5cbe58d7a3fbfdd6 SHA-256: 43636f420f8af42e5724efc7335d785516cb19ea031287e1187007388c161804
192 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically designed to lure users via an image or link. The primary redirector URL, https://gettraff.ru/aws?utm_term=bayonetta+guide+ign, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the redirector suggest an intent to deliver a secondary payload or phish for credentials. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6975

Heuristics 4

  • 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.
  • 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.
  • 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/aws?utm_term=bayonetta+guide+ign In PDF document text
    • https://jaxumemiri.weebly.com/uploads/1/3/4/4/134465633/vidadiwaxumijodo.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/mizunima.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/vimimijidife.pdfIn PDF document text
    • https://pikotefomulig.weebly.com/uploads/1/3/4/3/134317367/muguxavetofapeseluk.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/gajabedafot/ragnarok_m_endless_tower_quest_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cb5b9c-d14f-42f3-9fd4-61e6ebc8e9c8/99090077832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfef43d4-40cf-42bd-b3bc-8247a2a5ec0e/harry_potter_font_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a205d2f6-f70e-4f92-922f-c08e1b14ecab/73074327157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e2ebf1-ccb3-4e90-a6ea-082a5a7bc229/13100678918.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/81775075572.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/yasin_suresi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f056c0-7fae-4db2-bc52-5576cf6de5a7/46575239505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c656216c-b7ea-498a-b38d-e41c02e5ec56/gofuga.pdfIn 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_off00027ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27BA4 4720 bytes
SHA-256: c1e5e0160fcc4212e24514e5d0ba4385a65bc0cc65abe0bfe255b24dde4d34c2
font_01_sfnt_off00028bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28BCE 12044 bytes
SHA-256: 7fea2dd2e088a3c4c9d8ddb34d0b803a9fa94d87b1370c19115b8ff7a671ad36
font_02_sfnt_off0002b309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B309 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333