Malicious PDF — malware analysis report

Static analysis result for SHA-256 6686c0de7d9a2b81…

MALICIOUS

PDF

65.5 KB Created: 2020-08-23 13:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b0e06a23d92c1f233064bdac1ac49d6 SHA-1: 4c43362ac4f8d63a163f5f9a7e35315436c1f928 SHA-256: 6686c0de7d9a2b8140ccdd2948805686ccfdfa0d6abc234fa4a76a7804874730
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to known malicious redirector infrastructure, disguised as a movie download. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=arjun+reddy+full+movie++in+playtamil
    • http://files.flaentertainmentinsider.com/uploads/1/3/0/7/130775470/gajimi-bidizijupewa-nurufuparuk-xosirivu.pdf
    • http://jixako.lorimohlenhoff.com/uploads/1/3/0/8/130814328/261ff5c51a.pdf
    • http://files.legacycakery.com/uploads/1/3/0/7/130775516/801c520.pdf
    • http://files.createdesignrestore.com/uploads/1/3/2/3/132303278/916120b5b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/pdf_livro_auto_estima.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/rominuxavejabelovasuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/ar_15_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6628/4446/files/70902839663.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/woxisafonewefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5015/files/bendix_king_kx170b_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/normalizacion_de_base_de_datos_ejemplos.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_off00009d53.bin
111fa712fc9c2c367b0d7f2a00d730aabff26c25aa2d8662675492f0b2a10398		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D53 5236 bytes
font_01_sfnt_off0000af1f.bin
59e5e58de6af7a46cdbcfe545c746c240108009d36f9dc051d01037cbe7503b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1F 11444 bytes
font_02_sfnt_off0000cc77.bin
1d89c611ece6b2a5e1a519d4dc7742c99bbaf5bb204be15af7f23ec992c46de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC77 14532 bytes

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