Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae43a5dfa472c44…

MALICIOUS

PDF

46.2 KB Created: 2020-10-14 20:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5bad46255e74749ec05df57ab1115bc9 SHA-1: 2f463670e856816acb05af55c3088863615f4f8e SHA-256: 1ae43a5dfa472c44e6950d5f91388278f8aa3e552adb33060a5b845da864c31e
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.ru/pify?keyword=math+gallon+man+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f87162062177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f87341f3fbee.pdfIn PDF document text
    • https://site-1039785.mozfiles.com/files/1039785/linefuzuzobuses.pdfIn PDF document text
    • https://site-1039460.mozfiles.com/files/1039460/97308144453.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/32347239106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f872bcbe573c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8717ca55153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f872c4058cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8555cbbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f8702e4d7b5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8718166d966.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/1/0433/7837/6867/files/sd_maid_apk4all.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/teas_test_dates_2020_csula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8010/9218/files/fujeletebofunibil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c259e2-22b2-405d-9678-fbb51953dbd2/20394968326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebf9b43-6726-470a-994e-1d0e36d05b00/82646362512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a86ef2-47f1-4e75-8da5-ba62d3e576e0/xexidefoguwojop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cebd8ba4-84d1-4066-bfb4-28b9ffff6ef6/942224978.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_off0000690b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 5000 bytes
SHA-256: f98eb5e63fc2b3b8322aef1be56ee22f75363569ae8a0c3da12121f14bca23ea
font_01_sfnt_off000079ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EF 10348 bytes
SHA-256: fd82bdd109efb1509997894baddbe537a9c9945363c61e41efb15cc21f0ef510
font_02_sfnt_off00009d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D13 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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