Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b1327bbfc42ce4…

MALICIOUS

PDF

52.3 KB Created: 2020-11-01 03:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7fbe234aefbc85bdf7e71a61605cd941 SHA-1: 3937cca23a3bee474f846243e9a378419ce4260d SHA-256: 45b1327bbfc42ce4a910a1f68bc2c52ea5d687ad07eb5f42d14cf273920c9613
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of an SEO manipulation scheme. One prominent URL, 'https://ttraff.cc/123?keyword=brainpop+food+chains+quiz+answer+key', is flagged as a malicious redirector. The document's structure and embedded links suggest it's designed to drive traffic to malicious or spammy content, likely as a form of phishing or ad fraud.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=brainpop+food+chains+quiz+answer+key In PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/nopuniguna_remanovasiki.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/3248215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f93a33b74f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_5f96b5ce4c565.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/3257f1d1a.pdfIn PDF document text
    • https://puniduvete.weebly.com/uploads/1/3/4/3/134341297/romozitazarura.pdfIn PDF document text
    • https://tokomekenipejo.weebly.com/uploads/1/3/4/4/134441443/70f7672f6ff3.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/4d2f9978-4201-4b13-9583-d1d842e8af24/10972859901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2032beb8-7d28-4cc6-b4c8-afcbb28cd479/48398851135.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/compositional_unity_definition_in_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300a4596-3906-436f-93da-6e656ca09d88/fuwasomexogodosuvidiwuzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a08e7e6-5fea-4cb3-8004-68d805aa20dc/88688987308.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/89833241593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8435/6019/files/short_term_memory_and_working_memory.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_off000081cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CD 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off00008bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 5692 bytes
SHA-256: 1779f64aa69f34ad540eb6ded48cdcb065a57a7874aa6c2e8295bfa73473ecee
font_02_sfnt_off00009f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F47 10096 bytes
SHA-256: 8ec973046bcdad8ce133cb808cbc93ef0d605c1a8b9d3ccb5e7feb043c19991e

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