Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d916495ba719fa…

MALICIOUS

PDF

43.7 KB Created: 2020-11-05 20:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 5abb96300c8a8cb90d24e202a5f15750 SHA-1: 36f066802f94b9d87ca40512220c4497f72697ab SHA-256: 00d916495ba719fa3ec5e590870e9eb93ee30738d687c42d251d8e0f5e6b8f67
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which are part of an SEO link farm. The primary malicious URL identified is https://trafffi.ru/aws?keyword=simplified+method+worksheet+2016, which appears to be a redirector for phishing or spam content. The document's structure and link farm suggest an attempt to manipulate search engine results or direct users to malicious sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=simplified+method+worksheet+2016 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416514/normal_5f9fd28c60fed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f8a3e35c7dae.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/kupavenuwirupezef.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/4514735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5fa156c5a36f0.pdfIn PDF document text
    • https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/fubotibumerika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f971bcbc8347.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/879507d7-ef75-4ce9-b343-ffcf7dbcb916/63203523352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1761/5544/files/fish_oil_supplements_benefits_for_men.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c62873f-f07c-4f3a-b22f-3cc22b335b54/79878956658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33bb3d6-3585-40e9-b91c-d31815eeb98e/14130198270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14c3d4e-044b-42f6-8bcf-c04a20a73aff/14512852648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ed0dbe-ce91-4132-b480-4595aead7da1/hsbc_bank_of_nevada_lien_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d5a96e-08eb-4cbe-a411-cae85e4e40b8/paxovarat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1cc0f8-04e2-4483-b7c1-287e70c74de7/covenant_eyes_alternative.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_off000060e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 5812 bytes
SHA-256: ef83aeccc0bea4d3cb91bd8cdb3b9255e2051fbcdd8db973e229730c57683659
font_01_sfnt_off00007492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7492 2168 bytes
SHA-256: 5847cc5d0e38d7d3bce039802537367054f4c703f33f311dd2e8297b69233f74
font_02_sfnt_off00007def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEF 10496 bytes
SHA-256: ca67cdc8f9955ee699574d1c255fc1e75dd68b2b36ece58466895563f456a557

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