Malicious PDF — malware analysis report

Static analysis result for SHA-256 a048ffcdad8aaeba…

MALICIOUS

PDF

43.0 KB Created: 2020-09-16 05:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: de5185bde1358bd8302b0f6d6cd96845 SHA-1: a2b4737c33e0bd0c07b3ec16cdc1c60e5fe09a73 SHA-256: a048ffcdad8aaebafb85bb11b247ec474fb0912510f7346be5bff493d8eef06f
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.club/pify?keyword=south+bend+lathe In PDF document text
    • http://files.dwpboutique.com/uploads/1/3/1/3/131382387/waxukuxulidawo_kigorisepotunij.pdfIn PDF document text
    • http://muxotawo.j-acevedo.com/uploads/1/3/0/8/130814070/nunam_misuledulozona.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/1/0436/2724/9826/files/ankle_block.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/bidefetowebajekerab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/35607840576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/ziroperadadob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1280/0168/files/fewapetuvuvovupin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/silavivitibofupapisim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/physical_chemistry_quanta_matter_and_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/mymathlab_answer_key_statistics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9852/2014/files/cadbury_oreo_quiz_answers_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munuzajutajamarigeregutoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/safefawulaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4438/6454/files/6183762013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7269/8006/files/macromolecules_study_guide_answer_key.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_off00006a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 4880 bytes
SHA-256: d5f62af74348347bfde02da72ebf5653804d21a4ebdb44e7440e59f812c6d43f
font_01_sfnt_off00007ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB5 10856 bytes
SHA-256: e07dc9adb29ee0d1859c6943e521357636bf3103fbd336ce7ae6c1890ed7be6d

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