Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc55e9d46ade4473…

MALICIOUS

PDF

47.6 KB Created: 2020-10-09 07:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 057c65f32b88be8fc8ad525bc1458ff2 SHA-1: a49fb7fbfd20b807885734b09a3c31d4e70faa00 SHA-256: dc55e9d46ade44731c77485ec246da5f99958d2ecfb287f1f7ee2b6fd414d750
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.link/pify?keyword=australian+shepherd+collie+mix+weight In PDF document text
    • http://nezaj.fitnessbyrevolve.com/uploads/1/3/1/4/131406226/pemugugonilijip.pdfIn PDF document text
    • http://files.cemscompany.com/uploads/1/3/1/3/131398224/sirabov.pdfIn PDF document text
    • http://files.friendsofskihi.org/uploads/1/3/1/8/131856084/6485e2849a1.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/1/0498/7813/9035/files/the_important_book_activities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/flappy_birds_unblocked_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/lewis_theory_of_acids_and_bases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3527/0554/files/minifesidom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/vertical_angle_proof_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19996360-acf8-459c-9462-3dd0a97e9a39/jipetuvuzuvufifekule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9507f7b0-85a4-4cb8-847d-e9546b85bb45/biwuponafepisudone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fae1969-a3ff-470a-bd41-40f44785cc28/nabopuwuluperabaselixoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9539c229-248f-4693-9e4c-ecbe2a2a65bb/26909859508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1358/3260/files/migegaragosapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0414/6076/files/secret_core_recipes_game_of_war.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/relief_recovery_reform.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_off00006d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 5516 bytes
SHA-256: 8d564bc34a05cf2b4e0fa1b71cc79fcc3d7774f69d11a4874bd6076d309f6081
font_01_sfnt_off0000803e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803E 10260 bytes
SHA-256: 751c03edb91db7258d713abcf4b886a5b9e2e7b9faf11380c852362dce900a34
font_02_sfnt_off0000a36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA36A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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