Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dc16d79dd5fb54…

MALICIOUS

PDF

34.8 KB Created: 2020-10-23 19:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7a67daba461c1386eff7b0dffd5e9b56 SHA-1: 9cdb13884afedb267636cbb21faff15756dbbb2f SHA-256: 06dc16d79dd5fb542aa4668533c9d1200236df33aabbbcb0350731172228d97e
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a high number of embedded links, many of which point to redirector infrastructure. The primary redirector URL is 'https://cctraff.ru/strik?keyword=who+betrayed+the+african+world+revolution', which is flagged as malicious. This suggests a phishing or SEO spam campaign aiming to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://cctraff.ru/strik?keyword=who+betrayed+the+african+world+revolution In PDF document text
    • https://gamupizesusaza.weebly.com/uploads/1/3/1/3/131398140/posubuxapeb_fufivito.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/tazulasepukinuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f8f9d4c91a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f91a7b7b99f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5f8f790753b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f9118cf610bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f8e0b866e110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f8d1da178e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f927add93ce6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/vupunabu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/34778320247.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/fuzekopolunivunejofa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/95854178019.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tuxafixemukira.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/71169213273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3635/0885/files/guxavimenadudifow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/awesome_cheap_android_phones.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4985 5336 bytes
SHA-256: cb71c5b354dc0919656e4df138fced18cad9bf1ef3348087a94e24f5e68793a4
font_01_sfnt_off00005bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC7 9960 bytes
SHA-256: 2753b05525f76b005fbfc85933a07a9249655e63d2d06ec23382fb50f3ff450c

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