PDF malware analysis — malicious · a50744b7d4da888c

MALICIOUS

PDF

52.6 KB Created: 2020-10-28 00:20:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23

MD5: 1eb7b45ce513cc632905b21ce24eff87 SHA-1: 63040808531c3a31159536d7a8adee9e92734fc1 SHA-256: a50744b7d4da888c20c706e1fb5c23f709f22d2b0550f2ec61734133edbc9bc6

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.cc/123?keyword=difference+between+ribose+and+deoxyribose+sugar+structure In PDF document text
- https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/tuluwe_pukixideti.pdfIn PDF document text
- https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/d2aec667.pdfIn PDF document text
- https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/jilopabij.pdfIn PDF document text
- https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/fa79472aa8e5.pdfIn PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
- http://www.phschool.com/science/biology_place/biocoach/bioprop/ribose.htmlIn 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/c4ff02af-c020-47a2-b152-837e150f77bc/60407328484.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d1e46b36-16f6-403a-816e-e0c384d0e013/nogamavelesonazagomaw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27748603-9bfa-4675-8538-6c97f8c4a577/69618923233.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69d883c1-f334-4ba1-828e-5f6149ae0128/kokebototawopeti.pdfIn PDF document text
- https://s3.amazonaws.com/wogikokuzotaxa/java_array_programs_exercise.pdfIn PDF document text
- https://s3.amazonaws.com/dukajevo/mastering_metrics.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/72457283287.pdfIn PDF document text
- https://s3.amazonaws.com/vufupu/93508452933.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/8523/2811/files/78838396232.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/4634/1270/files/natomas_high_school.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b955cfb7-c7bc-4c85-8e18-4c4deb6e4b15/24769235430.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c447b86e-d393-452d-9e82-778a045c2c88/tukezibad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/181dc23a-cb3e-46e7-8ef3-03906805e649/14203558809.pdfIn PDF document text
- https://s3.amazonaws.com/xanebavifamopez/15908563418.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/aditya_hridaya_stotra_meaning_in_hindi_download.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/juxaxapenavo.pdfIn PDF document text
- https://s3.amazonaws.com/zuxadol/doyle_brunson_online_poker.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000081cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81CF	3304 bytes
SHA-256: `d7d013408685d1bf1dc1dee1d90893ea0daaa0e4e5db9584292ef4d00e01cff0`
`font_01_sfnt_off00008db3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DB3	5556 bytes
SHA-256: `4c4ea163c746dcd1c97c6d74be70bdaad7471fb3392d895031783a387bb10893`
`font_02_sfnt_off0000a0be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0BE	10404 bytes
SHA-256: `15782075c314170fc9e920353b5b41e7c7db7b7ee8aa495cf04ca9816cef5218`

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