Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e319c0f580916b2…

MALICIOUS

PDF

42.0 KB Created: 2020-11-01 02:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 883a285569f8969593caade9d1c9d39c SHA-1: 834099c335609620125779b77865235f7220d279 SHA-256: 1e319c0f580916b2858a0bbb52020c5cd18655ee10f19a2964e483ab80ac9a2d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference a sewing machine repair manual, a common lure for phishing or scam attempts. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests SEO poisoning tactics.

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://ggtraff.ru/strik?keyword=usha+janome+sewing+machine+repair+manual In PDF document text
    • https://rogusedi.weebly.com/uploads/1/3/4/4/134433103/moberaju_salomawep_xesetunubokola_tujor.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/narotuzudimuj_wudamagudevu_zafoxela_buxuwusuwabir.pdfIn PDF document text
    • https://nobaditidiz.weebly.com/uploads/1/3/4/2/134235496/5385581.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/1/0501/3399/1612/files/lixulom.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/zademebebebavikadenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890d0cd1-944b-4cae-9695-7f71a59a598d/14211142837.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/83592152899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6a2d90-b86d-400d-906a-56e6dd5f5261/43975166296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/bending_moment_equation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7757/3040/files/ebay_desktop_site_on_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8240/7318/files/2559366255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9006/0488/files/4212323171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9307/0502/files/thermal_energy_formula_thermodynamics.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_off000064f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 5504 bytes
SHA-256: 60f794d2cfee09ee006926ffc5a1dece5da37ec457a5de96b0deb36a267fc9cc
font_01_sfnt_off000077a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 10396 bytes
SHA-256: 01796ded7fd6b1cdc6b5d578928923462b64a7a77251f5844989f1897654e922

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