Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95496d499d5ec06…

MALICIOUS

PDF

35.0 KB Created: 2020-11-05 01:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 98b3a7c33bdcf547e962cb65433c3cd5 SHA-1: 3b84c2007b650a56f9ee6e64c38103e2e7a1a85e SHA-256: a95496d499d5ec062167b1ba0f6bcf412211d8d344eb39b34bee202a030b8c46
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `https://ttraff.me/123?keyword=noco+genius+g26000+battery+charger+manual`. The document body, though heavily obfuscated, contains references to this URL and other suspicious URLs hosted on weebly.com. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a fake document lure to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=noco+genius+g26000+battery+charger+manual In PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/viwibutesu.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/gowunufow_xapomozojegese.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/gupukegiseni.pdfIn PDF document text
    • https://bumujonawomete.weebly.com/uploads/1/3/4/4/134435367/boxakixob-zegibosujek.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/kagedatabujo/centroids_and_centers_of_gravity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515bebed-f5a5-4011-9de0-50a5a2116bea/63234773922.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/architectural_drafting_books.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/39105826786.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/7636040862.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/pixupadetalelovozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9fc915-ec51-48ad-9a12-ad48c7d378c7/fumalinowularuwodoxijivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a010c11-1bfc-4b67-b82e-aaab43cd5b41/rokolujavoxubexad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d823ce94-677f-4d9c-b7f3-ab71ccbb9704/14358289126.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/524850450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f0d0f9-a9ea-4ff6-b278-d7f6c8f86670/63481467628.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A33 5852 bytes
SHA-256: f6f028a0ac4b5086d0d79486536fcae9d548b8fa067458ddf7155c62324d683f
font_01_sfnt_off00005e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 9724 bytes
SHA-256: 53dd032f3d5f4f1b6bbfdabced40b6dbf041dd4790dc09895d89f3797770788e

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