Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b73473d3128b27…

MALICIOUS

PDF

39.8 KB Created: 2020-11-03 02:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 053825009a70d325bf3be9eb964fd63c SHA-1: 9b58c72911d43e4293ba87badcba6319cc5da598 SHA-256: 32b73473d3128b2761c52729d6dc3afc7561dd722514b5c240b2db8351c4e7c3
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=hoover+max+extract+dual+v+manual+f7411900 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5f98f720b74a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8ca52b99eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f966f42f093e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5fa09f5581083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f8cbc3ca8cfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5fa0240079afc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7309/2766/files/redbox_call_of_duty_infinite_warfare_zombies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/68128408723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/51405734543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4721/9100/files/gobomupililezirusow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8530/9103/files/wall_e_full_123movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4892/7900/files/apk_mirror_facebook_android_tv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9119/7629/files/83021369224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9559/8271/files/kapizuxepowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1225/7952/files/wexuzokavamasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0420/5503/files/75425443743.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_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 5596 bytes
SHA-256: e56a9512fa77295a0433a493e834473ea5e8aa7a1db20d5b28863926908d22f4
font_01_sfnt_off0000711e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711E 9688 bytes
SHA-256: 5b4228232ed3381056f6d3b26cee1d091b7876d4481c69fc28cbc29da37725e9

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