Malicious PDF — malware analysis report

Static analysis result for SHA-256 7802250d4464a9a5…

MALICIOUS

PDF

48.3 KB Created: 2020-10-25 09:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fa89dad3a93d568a69570c115b717dfa SHA-1: 69052dedbb0aa7e48de25e71a46360eef3669fd3 SHA-256: 7802250d4464a9a57f2410a2e4f0cb8aed1196997fde3067d7ee768b224dd300
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/aws?keyword=astm+d445-+15+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f92089c667f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f90f30b4046f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f8ee5f83b274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5f8b46a5050e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f932139440b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f939f14c4f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f90ac55d4b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f891c3cdfd99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f8858dcb001f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5f945c5071b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f910ff08b0f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f872c48c3f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f8a760932292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406777/normal_5f9243eb36a87.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/1/0433/9613/7111/files/kindle_fire_hd8_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/prepositions_of_place_test_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2056/5156/files/multimedia_text_set_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/44013604843.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/61185663148.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 4540 bytes
SHA-256: 7165c53cbf85b0aead866f126a372a0c6a74c84aa950537deb8b24b223e07d7d
font_01_sfnt_off00007d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 12408 bytes
SHA-256: fcc94a0821e8c965c7ba189dbbc5e00123603d46a3c5205629d13fa04ebb98c2
font_02_sfnt_off0000a5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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