Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6775ea39adc65db…

MALICIOUS

PDF

48.0 KB Created: 2020-08-19 01:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ef4242033b78748ab9283840d286edcf SHA-1: 7470471922e50343969782bd941a8d15bb5fb20f SHA-256: e6775ea39adc65db2cb031b42e7743a714225ce6f10ce0ec53d334e8f746404b
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=android+browser+online+test In PDF document text
    • http://larasedu.saintsnetballclubgisborne.com/uploads/1/3/1/4/131438379/f59d2759710fd.pdfIn PDF document text
    • http://furire.michaelmattoongolf.com/uploads/1/3/1/4/131407406/1630066.pdfIn PDF document text
    • http://neredatuj.expressyourselfiepb.com/uploads/1/3/1/3/131380213/3455200.pdfIn PDF document text
    • http://files.blythetierneydevermakeup.com/uploads/1/3/1/4/131406181/xagixur.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/1/0440/3416/2853/files/sat_heart_of_algebra_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/55204062127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/5907968371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/lowalazerafixunalazojokup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/feludibujilabad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/83717426057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/23113610374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/woxavar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/6041220727.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_off00007162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7162 4620 bytes
SHA-256: dd2e24f4d3a84d96c06b170cd2c3c4c893c806b00613da9b81aeab2d54f59b2b
font_01_sfnt_off00008122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8122 10716 bytes
SHA-256: 1661f4288a6db977ffe08f72a62149423817b6be8660ce05cb20304b63c71d04
font_02_sfnt_off0000a54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA54D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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