Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ff3f424a47bd8a…

MALICIOUS

PDF

46.7 KB Created: 2020-10-11 01:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e0a3474fcf6a408ceb92967285a67b7e SHA-1: 346ac63e65d1dd8281d43f69652f6ca355bbe8e4 SHA-256: 95ff3f424a47bd8a9f573fa01735867acf3eb6c7617ed06c750fe00ffdf4a9b0
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.com/pify?keyword=5x+plus+size+clothing+wholesale In PDF document text
    • http://pujog.nadiaid.org/uploads/1/3/2/8/132814930/jesef.pdfIn PDF document text
    • http://files.fcwomenandfamilyshelter.org/uploads/1/3/1/3/131381006/6331783.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://uploads.strikinglycdn.com/files/ed8eab5d-38c9-46a1-9064-ec7ad07a1c33/mukajibabulotikax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/778f6568-715f-4808-acba-3ced93ae81db/dogupewurufegen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8140197-44b4-4067-bc2a-2b84243b5e8b/pazuxib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd7736d-6cda-4c98-9d25-17a2a1f12ef1/nodinajusutuvosemibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ca2f1a-03c8-4d6f-a59c-752fbd4f2aa3/xelakakoxefoburumeluku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7643/0240/files/pejize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9093/0592/files/star_trek_armada_3_klingon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3187/4714/files/apx_alarm_thermostat_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e48462-978c-43f7-b693-91caab567f4c/25862296458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33732801-094b-4638-bcd9-5a10ef903bbf/93389735402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f97ac97-22d8-4bd6-9471-522908f6406d/32243029957.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_off00006a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B 5220 bytes
SHA-256: 5feb907aec794a78281659dd1b61010aa135202ecdd68353134b96b517d6777c
font_01_sfnt_off00007c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C42 10476 bytes
SHA-256: 92edccb77f318c6d5724a77d4f02e613c8b9f598cc164c7fe6045ac24c56c423
font_02_sfnt_off0000a000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA000 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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