Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfb1c89ef110442…

MALICIOUS

PDF

42.1 KB Created: 2020-10-27 14:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: cc64055d7edb3659bea87b881d48e339 SHA-1: cab628b208f3436109d8f19658601ced3aa314d4 SHA-256: cdfb1c89ef110442ef940520daceb0c9c8e30e447d1ecb13b34771c67c918969
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.cc/pify?keyword=red+bull+gmbh+annual+report+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5f91fca1f15ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5f90f6305129a.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/kovugokugamuzep.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/ceb0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006193.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006193.bin)
    • https://cdn.shopify.com/s/files/1/0434/1514/2567/files/break_the_bankers_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8392/6171/files/small_business_plan_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9618/5249/files/vlc_player_apk_for_mi_tv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2551/7720/files/dopunojepidufesija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/kubetegasetexa.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/autocad_2014_to_dwg.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/werojukugela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96be2e8-3f7b-4864-8f3c-f28f9979c815/new_england_seafood_restaurant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab74d4c1-0740-411d-8bb0-f9cd5dc32878/tower_unite_metal_detector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e55381-5c2d-4507-8e57-991c79face7a/xefufakeluvuzadakigelen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0249bf-5ab2-4535-af71-8bbe08099c0b/91228258212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d483658-1861-4f21-a8f8-4464de2dd7c1/33120279870.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/mopilaxikubuv.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/kaveviz.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/dunov.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_off00006193.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 5824 bytes
SHA-256: 1412c5e89f09960fba7471415ee962405d514be01888280a498f98ee9a9f3236
font_01_sfnt_off00007537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7537 11072 bytes
SHA-256: 899767810bb2180df7cddc81b04b564ef856352b410f059b7d0a95b90478e32f