Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a81e1ff4758a4c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-14 03:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68b43b896eaeb297974055ce2691aa1c SHA-1: 003d4ac0016cf8c666c34e92f459af72f83ff9f8 SHA-256: 64a81e1ff4758a4c11abdcc622a846fb53f5e1ec17642ce68b088ba7f475e908
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominent URL leading to a known malicious redirector. The document body also contains a URL that appears to be part of the lure, suggesting an attempt to direct users to malicious infrastructure. The ML classifier strongly indicates malicious intent.

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=tamil+movie+video+songs++hdvidz
    • http://tivanif.daddysmoneymarketgoats.com/uploads/1/3/2/6/132681237/0d68f1ef.pdf
    • http://saxuvire.jetbossphotos.com/uploads/1/3/0/7/130739564/judelaxesi.pdf
    • http://files.millcreekpartnership.net/uploads/1/3/1/6/131607075/1e6616ee793fdbc.pdf
    • http://files.victorialeeoboe.com/uploads/1/3/0/7/130739713/kizusewev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/english_learning_book_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/monografia_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/gigenapuwufigenutawof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/jurnal_batuan_sedimen_klastik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/vumexakov.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/patinomolenududuxiseje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/elementary_beam_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/pimopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/legit_csgo_skin_sites.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4756/files/9241493800.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2453/files/34023619585.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/nuxolasurotexutaveraguzu.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_off00005229.bin
683ee12dcc69d4070ee8df63f86d28ae7e588ea0850dd9d6ec5e01e7421694c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5229 4912 bytes
font_01_sfnt_off000062b8.bin
d46372028fa088ecd8e9868b84ce19c6ef704b3ef6925c6cba08d95e87d8596c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 10004 bytes
font_02_sfnt_off0000850b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850B 4324 bytes

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