Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5251849469dd2d2…

MALICIOUS

PDF

40.3 KB Created: 2020-10-29 22:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bf885313c472011ce721ac0ab55c961f SHA-1: dc35137231c9b0be95b476360b4c4306030549d9 SHA-256: d5251849469dd2d21a6bf16a371a0b6b439c17d00301c01393528871ed279873
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.me/123?keyword=dank+nation+dispensary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f8fc8d7ed930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86f4d8ba374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5f97017809186.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000606c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000606c.bin)
    • https://uploads.strikinglycdn.com/files/1f05d21b-645b-4cfd-a591-f937f40f4f9d/watuxede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2664/7709/files/vupakotogudavagamimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cca819-094c-4c4f-9ad3-0a2ae4783585/onkyo_tx_sr502_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e35f48-1210-4d6c-91c9-3f65fed1596a/rotifojipaguwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4263/0563/files/gezajejozupepitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2460/5094/files/disaputifebukukozujukudov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8106/7421/files/24270290915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d126389c-9aa1-499b-9004-5f738e7783db/79518503331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4fa2d8-c723-400b-9cd4-0314980d27b3/25900656996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7131/3822/files/othello_by_shakespeare_download.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 extracted file (font_00_sfnt_off0000606c.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 5084 bytes
SHA-256: 60a78611ae603d6ce060912bd42a0df8f9dc5f4afc5bd1a02d67d2530eeaf92d
font_01_sfnt_off000071d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 10108 bytes
SHA-256: 0fbbd6db05d92fcf3f25b675d3f4aeb4390141194ec6b9919a7ca7669cf0ed1b