Malicious PDF — malware analysis report

Static analysis result for SHA-256 72be684c8e8e7e85…

MALICIOUS

PDF

45.8 KB Created: 2020-08-16 21:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c014836292fa4f65168aef5861e55827 SHA-1: 428860505955477cedc3e42f3fd4ff5f87d86ba3 SHA-256: 72be684c8e8e7e85d4b586e7cab66edd9284fd496a0e3d196b2426d1c47164e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This suggests the document is designed to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://ttraff.com/pify?keyword=horseshoe+lake+ar+fishing+report
    • http://rerupanez.gailblevinsky.com/uploads/1/3/0/8/130874493/9afab83b65a0.pdf
    • http://files.royandcher.org/uploads/1/3/0/9/130968996/sewikik-palulo-nuwijokutaveg-dezorusotigase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/1497035447.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/bimakuxakawejuru.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/arifureta_shokugyou_de_sekai_saikyou_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/61713046487.pdf
    • https://cdn.shopify.com/s/files/1/0429/6533/6217/files/98852131680.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/vapovoxofelemorop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6968/5414/files/50198611141.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/elementary_statistics_picturing_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/lerigavifisunewusuzimepef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/fire_emblem_binding_blade_rom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/jonuvepu.pdf
    • https://cdn.shopify.com/s/files/1/0449/3679/0171/files/cardiomiopata_periparto.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067cb.bin
87adda8ca492e6cd5b69e27c6d976df0cf5c734d1d46b520ebedd17c7277b5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CB 4976 bytes
font_01_sfnt_off000078aa.bin
8965e3ff106b82aab73d3a589cd79b4933fc16295d7bd214ecd350cd2b2e0734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AA 10472 bytes
font_02_sfnt_off00009c87.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C87 4324 bytes

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