Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f83c1453524f3f6…

MALICIOUS

PDF

36.2 KB Created: 2020-10-26 23:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6abf4bfaab02e9c6739b177ad0262d2f SHA-1: 883973f377edad2e29312cc2e67d9272dc390610 SHA-256: 6f83c1453524f3f611e9e08a0abed2ed698e613aba0432ae66065e74d8ef69ef
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=the+giver+by+lois+lowry+audiobook+chapter+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5f950c61ab169.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/vikufof.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1183494.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/6a9a9daeda.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/jomamusenaxitejipad.pdfIn PDF document text
    • https://pepepijofo.weebly.com/uploads/1/3/4/4/134464576/7b13e8e1ac0d0f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004da8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004da8.bin)
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/78137218903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7506/8606/files/policy__procedure_manual_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4811/6639/files/acnl_coffee_preference_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0575/7605/files/20786805200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3303/3366/files/pathfinder_half_dragon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/27861956959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3042/7817/files/tv_room_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/zuxovobawobeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1855/files/30503197509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/dell_-_inspiron_15.6_touch-screen_laptop_-_amd_ryzen_3_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/89922247405.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/xixomomufogev.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/complications_appendicectomie.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/nicomachean_ethics_ross.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_off00004da8.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA8 5792 bytes
SHA-256: 8c8f28a2d4f1cedd52e479a814890a319585b12f366445eb9c4334f0d776123a
font_01_sfnt_off00006179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 9824 bytes
SHA-256: e887e691aae27143b1cc1e90ec274af90b7e1dea8078b1050182f6bda1620c3a