Malicious PDF — malware analysis report

Static analysis result for SHA-256 43087dca0e9317ec…

MALICIOUS

PDF

35.7 KB Created: 2020-08-05 09:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dba0c3c15ec0fa7dde2138210c46dd8 SHA-1: 1177e2167519447a51d865cac1c185d7ebffabd2 SHA-256: 43087dca0e9317ec83742a4b2888ed02f967dacbfd64cb05645e4fe7d8cd3d1f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=ylang+ylang+essential+oil+doterra+pdf. The document body, though heavily obfuscated, contains text related to 'Ylang ylang essential oil doterra pdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=ylang+ylang+essential+oil+doterra+pdf
    • http://files.essentoilcoverup.com/uploads/1/3/1/1/131164236/figuzixugikufexot.pdf
    • http://files.radboardsport.co/uploads/1/3/1/4/131454766/gufoberovofavon.pdf
    • http://files.thesarahenni.com/uploads/1/3/1/0/131071167/1140850.pdf
    • http://files.carolitaro.com/uploads/1/3/1/3/131380558/0d0d2710e949c5.pdf
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/29551894493.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/todelabedaxebagajeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/81609985122.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/bowflex_xtl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/yamaha_rx_v671_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/demoxoxizoman.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/vadagavexibowelomepitoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/xifejop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/jamuguwewukafowobezadetum.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/89051697715.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/32931911914.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/the_jaunt_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/mezugina.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_off00004e85.bin
d37073c70e82707623c5ac4005611b77277b727c58c573ec6e8dbade86b028a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E85 5272 bytes
font_01_sfnt_off0000608b.bin
5a256ae1702bfb6dff64f0bd5adf8353a30a301f145566d61a37b0e0ef6bf806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 9784 bytes

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