Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff55ea06d3518c7…

MALICIOUS

PDF

45.6 KB Created: 2020-10-31 12:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f775a083e66cb942f32ae95b23c16669 SHA-1: 9d44a6fb9b3b977d77dea36a011c2d48f60f052e SHA-256: eff55ea06d3518c7ac3df9a875cc1cbcd70800d4622b00d768bbfa66f7ff0993
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/123?keyword=california+association+of+realtors+residential+lease+agreement In PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/5a6f19fa768b88.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/28332.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/70886b40-93ec-4479-8f7d-bc8502f1c40a/fasuligirak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd0bbd6-36bd-4877-9794-589a7b48ddf5/sifofisarodili.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/64667090147.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/accounting_cycle_practice_set.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/8092119004.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/free_new_amharic_books.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/3d_printing_concrete.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/oates_energy_water_bill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c114603f-946b-434e-a26c-3bf13c7e1cc6/huesos_del_craneo_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5732/2430/files/73819799295.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/ninenebarotumolekikori.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_off00007199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 5248 bytes
SHA-256: d0c050cd44e2ed17792dfa58a6a83902ac1c263aa17cb50c0e4c33484cf7ae55
font_01_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 11060 bytes
SHA-256: 4945ed4bcbdea8ec499429061c33528dbd474646a54ed7fcd487c8e84fe40a90