Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b931a357221fc5…

MALICIOUS

PDF

47.8 KB Created: 2020-10-28 03:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 4d665ca43cc8af212b98052dcbca9ce4 SHA-1: 35f4c2900d617be9f0ae09f882f395a91a5ac32d SHA-256: 45b931a357221fc510df6fb6a97eee961282208cd86ae056236c984360d78ee0
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=matt+houston+tv+series+dvd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f98c87b04ae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_5f9774817fc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f90992ae3826.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/7178280.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/5204827.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/5064079.pdfIn PDF document text
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/jutezunotu.pdfIn PDF document text
    • https://nefenupenarus.weebly.com/uploads/1/3/4/4/134476068/71e7b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007048.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007048.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000a369.bin)
    • https://uploads.strikinglycdn.com/files/b8a73c1d-cb44-4a55-b226-6cb44970e4d1/support.nintendo.com_wii_error_code_51030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7a8694-ded2-40d9-bb2c-ab28062ca71a/ninifuziterezexofijaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/vozaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5378/3453/files/mekavikego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/22258699480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4415/4791/files/mubogexotagetuzon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3958/9030/files/scary_stories_to_tell_in_the_dark_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/irritable_bowel_syndrome_pathophysiology.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/the_modes_of_ancient_greek_music.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/xupogokexukosuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/61695030893.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/tegoxafukolozini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2545/1173/files/quality_control_8th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6316/3035/files/stern_saver_academy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/idioma_espaol_mexico_para_android.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_off00007048.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 4828 bytes
SHA-256: 9ec60f03de41d76a9bf3cdb09c638d9806f70a50bba9d9b287f5fc2eafa17360
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 10216 bytes
SHA-256: 2ebebde1a5527ee3ccd7a61abcd5b37d37f76ad5237ecdbf8e41fe46cbef3ac2
font_02_sfnt_off0000a369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA369 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c