Malicious PDF — malware analysis report

Static analysis result for SHA-256 d082ca4620b4ae5f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-02 14:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7ee9eb0b431319fa790f9eb50c7925f5 SHA-1: bbba2abae47bf24410925bd0bf6a5f8e98ce9260 SHA-256: d082ca4620b4ae5ff0f8a8f576127841ac3776e8fa08b270cc7ba42534967b4c
194 Risk Score

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.com/pify?keyword=unknown+filesystem+type+exfat In PDF document text
    • http://files.faithforher.com/uploads/1/3/2/7/132712080/pitagilopunovik-tajimafarujife-jewafozulajep-sasusilaxigu.pdfIn PDF document text
    • http://files.howardloring.com/uploads/1/3/0/7/130739443/dezomijotim.pdfIn PDF document text
    • http://files.southernblackhillswater.com/uploads/1/3/0/7/130738503/b493a3e9.pdfIn PDF document text
    • http://files.ashleymaclellanaat.com/uploads/1/3/0/9/130969297/vibipabos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/misowuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/89857031878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/azur_lane_wiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/34448547580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/35802557442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/disedokebeladijik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2655/files/84598098117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/54811345084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/befeborupotidofizido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/4828158269.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_off00006447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6447 5268 bytes
SHA-256: ead86e9274287e74287923223b93c82defb0b86c8d74aa9cdabae3a4f8637a9d
font_01_sfnt_off00007649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 10140 bytes
SHA-256: 94aacffb2a2ac5b665f5bd96d661e2bab81c6820487d3261d2b73a7893c2ca59

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