Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f31716a63b334e…

MALICIOUS

PDF

44.9 KB Created: 2020-10-26 20:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9431b863d21db5fa98d9da225447845e SHA-1: 9066be7eaf785e7e350f701aa5faef2a044ad0ea SHA-256: d7f31716a63b334e14476a9d878356fe4663282dcbbb0ac49bdb7c36d162b5cc
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.link/123?keyword=ferris+bueller%2527s+day+off+movie+download+720p In PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/semoxowiwelile.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5245467.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/da50c7e0ec8f483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8a2c5fc7ff7.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/ruzapomase.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/cabd7f5029.pdfIn PDF document text
    • https://duxuborokepab.weebly.com/uploads/1/3/4/4/134449965/vatitezunosok.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006cfc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006cfc.bin)
    • https://cdn.shopify.com/s/files/1/0268/7513/4135/files/79012877175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9076/4463/files/zawal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2283/8692/files/how_to_remove_a_pocket_door.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5466/4342/files/lowolugonofezek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9921/7827/files/87493335892.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/zupibokurilezowe.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/almaty_map.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/654184924.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/auramine_o_staining_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/catalogo_de_cores_suvinil_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/sivovakagetizixiro.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/webowilodotejoxebol.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/99786158987.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/37253161129.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/73542816331.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_off00006cfc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFC 5924 bytes
SHA-256: b8ad49d15964a4b59ca0659a23d876056d112a0b62479288431296014fc0ca00
font_01_sfnt_off00008137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8137 10656 bytes
SHA-256: 52a7fc016e980ba0638bffc4638f1782f0eb6670cf784b22515a53c7f2af9e48