Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf3a67623f16f0a…

MALICIOUS

PDF

45.4 KB Created: 2020-10-28 06:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 88f8aee1f5ee2e99c5c27d271bff3214 SHA-1: e6b50e3a915db1e662585e607e7db1e0d882878c SHA-256: 2bf3a67623f16f0a1b62daf31d1463b969eca801504f984cb51f781e03a94f9e
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=texas+civil+war+secession+document In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8ba1588bb13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5f9444a585306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5f93cec0b6760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f94c3c826117.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/jewat.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/75d76974913a8.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/xawop_mavogejo_luger.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/1/0438/2910/0701/files/dodukepenimojofuwipamive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4410/7950/files/cualesson_los_siete_espiritus_de_dios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9096/7235/files/blankets_and_beyond_lovey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7238/0310/files/5225252973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/bloons_td_battles_eco_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8770/3453/files/tekidirugezenokuvem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9558/9018/files/4361428836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/36221887118.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/rental_agreement_example.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/the_boyfriend_list_e_lockhart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a53e78-08c0-47c2-a8ca-15ea4658c519/strategic_staffing_by_phillips_and_gully_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03257b7-7c09-45b2-a339-65965ce9638e/50721747434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0788d20-137c-400f-9284-30256e0cf64b/adab_al_mufrad_english.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_off000072a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A3 5256 bytes
SHA-256: 945d5a20e9e69592bcfc27abf124774240a2b6e87a5b444485e891ed0a5f0fb7
font_01_sfnt_off00008474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8474 10472 bytes
SHA-256: d85f425fcf78f63af752d6d20992ace63c49e00d18e7691ba37d6497572d5599

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