Malicious PDF — malware analysis report

Static analysis result for SHA-256 3505d0b88b59dde3…

MALICIOUS

PDF

49.6 KB Created: 2020-08-19 06:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e949643fe15b05946a4e34abeffb41d9 SHA-1: 2048fd6beae707c861078e73fe0f9bf60261edde SHA-256: 3505d0b88b59dde30ab14ba784dc0110627e3c86471a05cdded23b021555eae0
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=bid+wars+mod+apk+2.+13.+5 In PDF document text
    • http://risadas.tfdonaldson.com/uploads/1/3/2/6/132682646/jajotabidajolomi.pdfIn PDF document text
    • http://vonokiwux.fringeboutiqueto.com/uploads/1/3/1/6/131607163/vubamat_vazuju.pdfIn PDF document text
    • http://kezulema.miwellnesscbd.com/uploads/1/3/1/8/131856827/muxesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/the_executioner_s_song_1982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8342/3126/files/kinafeneti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4099/6519/files/saxazizipakiwuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/fetaridoraposawebojil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2011/4344/files/balun_canan_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/market_risk_management_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/21596471651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/51451125819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/angular_5_template_form_validation_on_submit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/68347398187.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6596 5268 bytes
SHA-256: c68c407fff41567c3985774623bf7887bf352385111ecd5904872d55e457a0f5
font_01_sfnt_off0000778a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778A 2892 bytes
SHA-256: 3f442327e5f3e078ff6e5532630e1be7b761aac22b14b1cee45e278dd9edf0e8
font_02_sfnt_off00008391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8391 12200 bytes
SHA-256: a147f087ef95b3355c2fcada5e3597cb0c233d8f93f5df4f0d8cb4ee06529ea9
font_03_sfnt_off0000aa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA93 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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