Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f07b3a3f3536a2…

MALICIOUS

PDF

44.2 KB Created: 2020-10-28 13:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c263c5299fe80c04a09a572ad4de879 SHA-1: 056b3136fe4cfd8e1e5c1dc01f7e0176c234cd62 SHA-256: 80f07b3a3f3536a28d48b4029c9cd9b5a5cb63e069eda4b6e187dbbc18f5611d
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that redirect to a malicious domain, likely to trick users into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic to attract victims searching for specific documents. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=sharp+aquos+60+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f88a78073be5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f8d80239aaaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f86f5528ed6b.pdfIn PDF document text
    • https://zexivuwesime.weebly.com/uploads/1/3/4/3/134356920/kowufaxipitex_febixamekob_sijawatag_pemuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f8a08a04e7da.pdfIn PDF document text
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/bazovaxofiwerexolar.pdfIn PDF document text
    • https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/gemokatekali-rafewevususoxag.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bofajifolapumalij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/giwizupepudebexolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284032e6-5d86-4321-8118-bf32bb96c252/77481704896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0a1176-6e2f-4bc6-832e-bdac75c041fe/31461023595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9428/7551/files/92500124885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/kadonowetibet.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/product_of_multivariate_gaussian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ddc8d6-4149-437b-b6f4-09813519cbbb/simawitokosozijoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6916/9054/files/albany_pop_up_adventure_playground.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/the_economist_magazine_free_download_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8611/1405/files/66868723339.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/1145887876.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/35200861404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/hipaa_guidelines_for_social_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e466a63-874f-4020-80e4-30044084719c/42983996587.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_off00006c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 5808 bytes
SHA-256: 9e51065f1ec5e6090417dd172373b8b0df48ec29268de8f40dcab4406340a3ec
font_01_sfnt_off00007f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 10656 bytes
SHA-256: 456117a9d7f04a2a0a70a975c01288feb8ef2e772b6f7cf03e6a012c0b8116e5

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