Malicious PDF — malware analysis report

Static analysis result for SHA-256 d467b9abdd805d57…

MALICIOUS

PDF

48.7 KB Created: 2020-07-19 22:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 4f365958a373a628c4c6165a48733663 SHA-1: 704fbbf3ee0ec07c9b5b186ff65dbca19b871f8b SHA-256: d467b9abdd805d5701300158b6fba7e49646438a8b6a44348e63b7a70f151f92
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a link farm designed to appear as search results for a popular book, likely to trick users into clicking. The primary link, 'https://ttraff.ru/wb?keyword=python%20crash%20course%20pdf%202018', points to a known malicious redirector. The document body is heavily obfuscated and does not provide clear textual content for analysis.

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.ru/wb?keyword=python%20crash%20course%20pdf%202018 In PDF document text
    • http://files.yourschoollibrary.net/uploads/1/3/1/6/131637656/xikejurudujop-jowaz-vobewizu.pdfIn PDF document text
    • http://files.drummermama.com/uploads/1/3/0/7/130776101/revazogedado.pdfIn PDF document text
    • http://files.bsmga.com/uploads/1/3/0/7/130776049/bitabavawedanoj.pdfIn PDF document text
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fuwewosalija.files.wordpress.com/2020/07/tigefapageda.pdfIn PDF document text
    • https://weliwililego.files.wordpress.com/2020/07/47610931733.pdfIn PDF document text
    • https://furirod.files.wordpress.com/2020/07/99474741858.pdfIn PDF document text
    • https://kiwepolojaka925135824.files.wordpress.com/2020/07/kajufizofexujofas.pdfIn PDF document text
    • https://fugonef.files.wordpress.com/2020/07/setusudidifafilukowumobax.pdfIn PDF document text
    • https://bugigos.files.wordpress.com/2020/06/sobebusazomivosobedul.pdfIn PDF document text
    • https://sidakosobo.files.wordpress.com/2020/07/91089147497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/54540704492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/25229550995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/jabuwewesabedisuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/78817448657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/57792274102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/sibigugafe.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 8

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_off000070f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5668 bytes
SHA-256: 3ab42d0b75837d2222e6640f076f0bf5847fd4c62b4b2954c07c5d97edb127ce
font_01_sfnt_off00008438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 16904 bytes
SHA-256: 31d2ad4f020c5ecc10dbed22abdcfc6dacfae748cc6d1b209c814627551b613b

Open this report in the interactive analyzer, or submit your own file for analysis.