Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6cba932c61e384…

MALICIOUS

PDF

36.4 KB Created: 2020-10-31 08:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 907c656cdd1ee6443089c78985091101 SHA-1: e718afc3676e90e009d671e84849a35a9b2b028c SHA-256: ff6cba932c61e3843f15ba7428a1ba4c0808561fd44d48a908eae1ccbd353bc0
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.club/pify?keyword=home+of+the+brave+toto+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f8d90d5d8fe0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d547fe0-c9b7-4774-9b83-58ece06e1f64/deus_ex_human_revolution_hacking_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9730/0885/files/grill_and_griddle_combo_lowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/mini_springform_pan.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/gowakaxufipexikemuvajesot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d193f93-79bd-47b9-abfb-ff19291062b9/14229109327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481d19d6-10b5-4f61-83ef-c00663c9a305/bch4024_uf_fall_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/cardiac_catheterization_technique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/pugedifanefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b946de77-3a83-43d1-8573-2af18e514a5b/pamuxegumugiwegewuweveju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4704/5278/files/89805126279.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/59701894340.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/trichoderma_biocontrol_agent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7e16e3-234c-4195-b730-3287f3a36ee8/ee_nagaraniki_emaindi_movie_online_watch_movierulz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/mamunapat.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000518a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518A 5232 bytes
SHA-256: 11f295b389c11c1bc3e6049095b7df7b2ff69da04889e8fc40f87450b12881cf
font_01_sfnt_off0000632a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 10360 bytes
SHA-256: cfcfc288cf91d135eb67187c919e087126eae0772aada97c969145937dd82c02

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