Malicious PDF — malware analysis report

Static analysis result for SHA-256 b254a7d0aa17ffea…

MALICIOUS

PDF

47.3 KB Created: 2020-10-28 18:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2a271e5dbfa57628ce65b294f0fae795 SHA-1: 28c3ca553cb08cc32df8d75633499f4583ef66cd SHA-256: b254a7d0aa17ffea0df22037db5a677978f5d7b6865178056627c34ab4dea14a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The document body, though heavily obfuscated, contains a URL that appears to be the target of the redirection. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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 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.
  • 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=pumptrol+pressure+switch+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9059759df00.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/a0b18.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/9506eb3ef.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/78a38.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/kavozijozelona-rozos-romuvalebiw-wemigazejuvu.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/2180033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f97342829399.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/gamuwemixej-tibirizepi-tulufejalefol-kiziviwob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8dff452342d.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/dukove.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/pelubevesitu-wuvoli.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/a8fa3155.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/roruj-fegedevovelere-zexomojikazi-rewubujelem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5135/9642/files/fat_princess_trophy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/6954413092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7862/2618/files/senzu_sharpener_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5535/2481/files/mibatalanuzexiribukason.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7562/4355/files/samoyed_puppy_for_sale_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6553/6412/files/16211562075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/jelujixixefevupabikaju.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 5264 bytes
SHA-256: 5bb19b901e3a670e5381c520d749748a3cd7510ea67989464a6c5d4d10486899
font_01_sfnt_off00008cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC7 10192 bytes
SHA-256: d237aef633dc9a2496152b117c13ed0d4f391b9185f706e1b8981e77c2efea48

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