Malicious PDF — malware analysis report

Static analysis result for SHA-256 59823a997942abeb…

MALICIOUS

PDF

50.0 KB Created: 2020-08-08 00:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f133ad89a2ba26002a26df056920625 SHA-1: fa80ecc568858de7093f8b9eea17103d8f37b76d SHA-256: 59823a997942abeb95db55baae707a585060e8b282218f96bdfb76f4d2e37e89
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=beloved+pdf+part+2', is identified as a malicious redirector. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm designed to obscure the ultimate destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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://ttraff.com/pify?keyword=beloved+pdf+part+2
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdf
    • http://files.ewa-lukaszyk.com/uploads/1/3/1/4/131437322/jubetupigiduxo.pdf
    • http://files.trailertruckintech.com/uploads/1/3/1/4/131437330/d6c0307afc.pdf
    • http://files.thejoyfulpalette.com/uploads/1/3/1/4/131437307/f1643db.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/vekapevedeluxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/jelirimerozamerejukakuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/52709239111.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/lonely_planet_georgia_armenia_azerbaijan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/8710950213.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/genomewab.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/portugus_para_concursos_eduardo_sabbag.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/vasipoxapame.pdf
    • https://cdn.shopify.com/s/files/1/0437/2765/0970/files/fogefigil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/xowiwevolajezuvakidilaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/17159905730.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/39238116749.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000876a.bin
684b05321d9473c79f496ee58c30caf675dfb1e52d67fcd5d610b6b9d2eb404b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876A 5100 bytes
font_01_sfnt_off000098df.bin
4e1d578e74561defcb508267b43919e23c9966495f71f7018b553c7063ab3e17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98DF 10036 bytes

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